Literature DB >> 25552983

Crystal structure of 2-benzyl-amino-4-(4-meth-oxy-phen-yl)-6,7,8,9-tetra-hydro-5H-cyclo-hepta-[b]pyridine-3-carbo-nitrile.

R A Nagalakshmi1, J Suresh1, S Maharani2, R Ranjith Kumar2, P L Nilantha Lakshman3.   

Abstract

The title compound, C25H25N3O, comprises a n class="Chemical">2-amino-pyridine ring fused with a cyclo-heptane ring, which adopts a chair conformation. The central pyridine ring (r.m.s. deviation = 0.013 Å) carries three substituents, viz. a benzyl-amino group, a meth-oxy-phenyl ring and a carbo-nitrile group. The N atom of the carbo-nitrile group is significantly displaced [by 0.2247 (1) Å] from the plane of the pyridine ring, probably due to steric crowding involving the adjacent substituents. The phenyl and benzene rings are inclined to one another by 58.91 (7)° and to the pyridine ring by 76.68 (7) and 49.80 (6)°, respectively. In the crystal, inversion dimers linked by pairs of N-H⋯Nnitrile hydrogen bonds generate R 2 (2)(14) loops. The dimers are linked by C-H⋯π and slipped parallel π-π inter-actions [centroid-centroid distance = 3.6532 (3) Å] into a three-dimensional structure.

Entities:  

Keywords:  C—H⋯π inter­actions; carbo­nitrile; crystal structure; cyclo­hepta­pyridine; hydrogen bonding; slipped parallel π–π inter­actions

Year:  2014        PMID: 25552983      PMCID: PMC4257429          DOI: 10.1107/S1600536814024878

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Chemical context

The pyridine nucleus is prevalent in numerous natural products and extremely important in the chemistry of bio­log­ical systems (Bringmann et al., 2004 ▶). 3-Cyann class="Chemical">pyridine or pyridine-3-carbo­nitrile derivatives attract particular attention for their wide-spectrum biological activity along with their importance and utility as inter­mediates in the preparation of a variety of heterocyclic compounds (Shishoo et al., 1983 ▶; Doe et al., 1990 ▶). 3-Cyano­pyridines with different alkyl and ar­yl/heteroaryl groups have been found to have a number of biological properties including anti­tubercular, anti­microbial, anti­cancer, A2A adenosine receptor antagonists (Mantri et al., 2008 ▶), anti­hypertensive (Krauze et al., 1985 ▶), anti­histaminic (Quintela et al., 1997 ▶), anti-inflammatory, analgesic and anti­pyretic (Manna et al., 1999 ▶) properties. Our inter­est in the preparation of pharmacologically active 3-cyano­pyridines led us to synthesise the title compound and the X-ray crystal structure determination was undertaken in order to establish its conformation.

Structural commentary

The mol­ecular structure of the title compound is shown in Fig. 1 ▶. The pyridine ring is connected to a n class="Chemical">benzene ring by a –CH2—NH2– chain. The cyclo­heptane ring adopts a chair conformation with puckering parameters Q2 = 0.4634 (15) Å, ϕ2 = 304.24 (18)° and Q3 = 0.6481 (16) Å and ϕ3 = 284.37 (12)°. The phenyl (C22–C27) and benzene (C31–C36) rings are inclined to one another by 58.91 (7)° and to the pyridine (N3/C2–C6) ring by 76.68 (7) and 49.80 (6)°, respectively. The N atom of the carbo­nitrile group, N1, is significantly displaced by 0.2247 (1) Å from the plane of the pyridine ring, perhaps due to steric crowding. The shortening of the C—N distance [C5—N3 = 1.3390 (14) Å] and the opening of the N3—C5—C4 angle to 124.47 (10)° may be attributed to the size of the substituent at C1, and correlates well with the values observed in a similar structure (Çelik et al., 2013 ▶). There is conjugation between the donor (NH) and the acceptor (CN) groups via the C2—C6 bond. Thus the C6—N2 distance of 1.3502 (14) Å is shorter than the average conjugated C—N single bond, 1.370 (1) Å, found in the Cambridge Structural Database (Version 5.35; Groom & Allen, 2014 ▶). Steric hindrances rotate the benzene ring out of the plane of the central pyridine ring by 49.80 (6)°. This twist may be due to the non-bonded inter­actions between one of the ortho H atoms of the benzene ring and atom H7B of the cyclo­heptane ring. As a result of the π–π conjugation of atom O1, the O1—C34 bond length of 1.3618 (15) Å is significantly shorter than the O1—C37 distance of 1.410 (2) Å. An enlarge­ment of bond angle [C33—C34—O1 = 124.34 (13)°] on one side and a narrowing of bond angle [C35—C34—O1 = 116.29 (12)°] on the other side of the benzene ring may be due to the steric repulsion between the aromatic rings and the methyl group, as found in a similar structure (Tokuno et al., 1986 ▶).
Figure 1

The mol­ecular structure of the title compound, showing the atom labelling. Displacement ellipsoids are drawn at the 50% probability level.

Supra­molecular features

In the crystal, mol­ecules are linked via pairs of N—H⋯n class="Chemical">Nnitrile inter­actions, forming inversion dimers which enclose (14) ring motifs. The dimers are connected through weak C—H⋯π inter­actions involving the CN group as acceptor (Table 1 ▶). They are further connected by slipped parallel π–π stacking inter­actions involving the pyridine rings of inversion-related mol­ecules [Cg1⋯Cg1i = 3.6532 (7), normal distance = 3.5920 (5), slippage = 0.667 Å; Cg1 is the centroid of the N3/C2–C6 ring; symmetry code: (i) −x + 1, −y + 1, −z + 1], as shown in Fig. 2 ▶.
Table 1

Hydrogen-bond geometry (, )

Cg1 is the centroid of pyridine ring N3/C2C6.

DHA DHHA D A DHA
N2H2N1i 0.862.283.0168(15)145
C35H35Cg1ii 0.932.993.5559(14)121

Symmetry codes: (i) ; (ii) .

Figure 2

Partial packing diagram for the title compound, viewed along the c axis. Dashed lines represent inter­molecular hydrogen bonds and C—H⋯π contacts (see Table 1 ▶ for details; H atoms not involved in hydrogen bonding have been omitted for clarity).

Database survey

In the title compound, the chair conformation of the cyclo­octane ring and the planar conformation of the pyridine are similar to those found in the related structure 2-(4-bromo­phen­yl)-4-(4-meth­oxy­phen­yl)-6,7,8,9-n class="Species">tetra­hydro-5H-cyclohepta­[b]pyridine (Çelik et al., 2013 ▶). However, the C6—N2H and C1 N1 groups whose presence in the title compound allows the formation of N—H⋯N hydrogen bonds, are not present in the above-cited compound. In the title compound, C—C bonds involving atom C2, which is substituted by the C1 N1 group [C2—C3 = 1.4024 (15) and C2—C6 = 1.4076 (16) Å] are systematically longer than those found in the related structure [1.392 (4) and 1.378 (4) Å, respectively]. In the title compound, steric hindrance rotates the 4-meth­oxy­phenyl ring (C31–C36) and the phenyl ring (C22–C27), which are inclined to the plane of the central pyridine ring by 49.80 (6) and 76.68 (7)°, respectively. In the related structure (Çelik et al., 2013 ▶), the 4-bromo­phenyl ring is almost coplanar with the pyridine ring, making a dihedral angle of 8.27 (16)° while the 4-meth­oxy­phenyl ring is inclined to the pyridine ring by 58.63 (15)°, compared with 49.80 (6)° in the title compound.

Synthesis and crystallization

A mixture of cyclo­hepta­none (1 mmol), 4-meth­oxy aldehyde (1 mmol) and malono­nitrile (1 mmol) and benzyl­amine (1mmol) was taken in ethanol (10 ml) to which p-TSA (1.0 mmol) was added. The reaction mixture was heated under reflux for 2–3 h. On completion of the reaction, checked by thin-layer chromatography (TLC), the mixture was poured into crushed ice and extracted with ethyl acetate. The excess solvent was removed under vacuum and the residue was subjected to column chromatography using n class="Chemical">petroleum ether/ethyl acetate mixture (97:3 v/v) as eluent to afford pure product. The product was recrystallized from ethyl acetate, affording colourless crystals of the title compound. (m.p. 415 K; yield 75%).

Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2 ▶. The NH and C-bound n class="Disease">H atoms were placed in calculated positions and allowed to ride on their carrier atoms: N—H = 0.86 and C—H = 0.93–0.97 Å, with U iso(H) = 1.5U eq(C) for methyl H atoms and 1.2U eq(N,C) for other H atoms. The DELU restraint was applied.
Table 2

Experimental details

Crystal data
Chemical formulaC25H25N3O
M r 383.48
Crystal system, space groupTriclinic, P
Temperature (K)293
a, b, c ()8.8509(2), 9.6364(3), 12.9090(4)
, , ()72.779(2), 81.033(1), 76.457(1)
V (3)1017.97(5)
Z 2
Radiation typeMo K
(mm1)0.08
Crystal size (mm)0.21 0.19 0.18
 
Data collection
DiffractometerBruker Kappa APEXII
Absorption correctionMulti-scan (SADABS; Bruker, 2004)
T min, T max 0.967, 0.974
No. of measured, independent and observed [I > 2(I)] reflections22986, 3798, 3177
R int 0.023
(sin /)max (1)0.606
 
Refinement
R[F 2 > 2(F 2)], wR(F 2), S 0.035, 0.096, 1.05
No. of reflections3798
No. of parameters263
No. of restraints1
H-atom treatmentH-atom parameters constrained
max, min (e 3)0.14, 0.13

Computer programs: APEX2 and SAINT (Bruker, 2004 ▶), SHELXS97 and SHELXL2014 (Sheldrick, 2008 ▶) and PLATON (Spek, 2009 ▶).

Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536814024878/su5014sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536814024878/su5014Isup2.hkl Click here for additional data file. Supporting information file. DOI: 10.1107/S1600536814024878/su5014Isup3.cml CCDC reference: 1033842 Additional supporting information: crystallographic information; 3D view; checkCIF report
C25H25N3OZ = 2
Mr = 383.48F(000) = 408
Triclinic, P1Dx = 1.251 Mg m3
a = 8.8509 (2) ÅMo Kα radiation, λ = 0.71073 Å
b = 9.6364 (3) ÅCell parameters from 2000 reflections
c = 12.9090 (4) Åθ = 2–31°
α = 72.779 (2)°µ = 0.08 mm1
β = 81.033 (1)°T = 293 K
γ = 76.457 (1)°Block, colourless
V = 1017.97 (5) Å30.21 × 0.19 × 0.18 mm
Bruker Kappa APEXII diffractometer3177 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.023
φ & ω scansθmax = 25.5°, θmin = 2.3°
Absorption correction: multi-scan (SADABS; Bruker, 2004)h = −10→10
Tmin = 0.967, Tmax = 0.974k = −11→11
22986 measured reflectionsl = −15→15
3798 independent reflections
Refinement on F2Hydrogen site location: inferred from neighbouring sites
Least-squares matrix: fullH-atom parameters constrained
R[F2 > 2σ(F2)] = 0.035w = 1/[σ2(Fo2) + (0.0427P)2 + 0.190P] where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.096(Δ/σ)max < 0.001
S = 1.05Δρmax = 0.14 e Å3
3798 reflectionsΔρmin = −0.13 e Å3
263 parametersExtinction correction: SHELXL2014 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
1 restraintExtinction coefficient: 0.028 (3)
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.
xyzUiso*/Ueq
C10.22942 (13)0.36297 (13)0.46578 (10)0.0409 (3)
C20.36435 (12)0.33965 (12)0.52093 (9)0.0347 (3)
C30.51117 (12)0.26601 (11)0.48631 (9)0.0339 (3)
C40.63263 (12)0.23924 (12)0.55100 (9)0.0365 (3)
C50.60042 (13)0.28670 (12)0.64557 (10)0.0375 (3)
C60.34347 (13)0.38756 (12)0.61609 (9)0.0356 (3)
C70.79452 (13)0.15737 (14)0.52501 (11)0.0445 (3)
H7A0.86950.21570.52640.053*
H7B0.80320.14630.45190.053*
C80.83483 (15)0.00402 (15)0.60507 (12)0.0528 (3)
H8A0.7422−0.03900.62530.063*
H8B0.9128−0.05950.56890.063*
C90.89589 (17)0.00700 (17)0.70713 (13)0.0653 (4)
H9A0.98920.04900.68640.078*
H9B0.9259−0.09420.75090.078*
C100.78190 (17)0.09421 (16)0.77684 (12)0.0589 (4)
H10A0.83130.08740.84060.071*
H10B0.69190.04770.80180.071*
C110.72484 (15)0.25800 (14)0.72061 (11)0.0495 (3)
H11A0.68450.31030.77590.059*
H11B0.81320.29870.67910.059*
C210.16754 (15)0.51651 (14)0.74336 (11)0.0471 (3)
H21A0.10770.61720.72430.057*
H21B0.26420.51900.76870.057*
C220.07695 (14)0.42293 (14)0.83428 (10)0.0438 (3)
C23−0.06616 (17)0.48310 (19)0.87858 (13)0.0618 (4)
H23−0.10980.58260.85030.074*
C24−0.1451 (2)0.3967 (3)0.96458 (15)0.0812 (5)
H24−0.24140.43850.99430.097*
C25−0.0834 (2)0.2504 (3)1.00645 (14)0.0873 (6)
H25−0.13660.19291.06500.105*
C260.0576 (2)0.1889 (2)0.96175 (15)0.0814 (5)
H260.09960.08880.98930.098*
C270.13711 (18)0.27461 (17)0.87634 (12)0.0608 (4)
H270.23290.23190.84650.073*
C310.52942 (12)0.22205 (12)0.38341 (9)0.0358 (3)
C320.47550 (14)0.32373 (13)0.29000 (10)0.0411 (3)
H320.43080.42050.29200.049*
C330.48591 (15)0.28606 (14)0.19354 (10)0.0464 (3)
H330.44880.35690.13170.056*
C340.55151 (14)0.14306 (15)0.18936 (11)0.0457 (3)
C350.60779 (15)0.03992 (14)0.28153 (11)0.0494 (3)
H350.6533−0.05650.27900.059*
C360.59703 (14)0.07863 (13)0.37677 (10)0.0432 (3)
H360.63560.00780.43820.052*
C370.4929 (2)0.1922 (2)0.00758 (13)0.0789 (5)
H37A0.51070.1452−0.05050.118*
H37B0.38270.21790.02670.118*
H37C0.53600.2803−0.01580.118*
N10.11429 (13)0.38506 (15)0.42880 (11)0.0609 (3)
N20.20363 (12)0.46344 (12)0.64721 (8)0.0466 (3)
H20.12970.48170.60610.056*
N30.46071 (11)0.35839 (10)0.67815 (8)0.0389 (2)
O10.56525 (13)0.09400 (12)0.09900 (8)0.0639 (3)
U11U22U33U12U13U23
C10.0330 (6)0.0428 (7)0.0465 (7)−0.0009 (5)−0.0026 (5)−0.0170 (5)
C20.0319 (5)0.0311 (5)0.0385 (6)−0.0031 (4)−0.0034 (4)−0.0082 (5)
C30.0323 (6)0.0271 (5)0.0391 (6)−0.0052 (4)−0.0001 (5)−0.0062 (4)
C40.0305 (6)0.0319 (6)0.0435 (7)−0.0044 (4)−0.0015 (5)−0.0070 (5)
C50.0348 (6)0.0307 (6)0.0449 (7)−0.0055 (5)−0.0063 (5)−0.0068 (5)
C60.0329 (6)0.0307 (6)0.0392 (6)−0.0025 (4)−0.0018 (5)−0.0072 (5)
C70.0293 (6)0.0477 (7)0.0522 (7)−0.0033 (5)−0.0003 (5)−0.0122 (6)
C80.0375 (7)0.0459 (7)0.0657 (9)0.0053 (5)−0.0003 (6)−0.0139 (6)
C90.0504 (8)0.0565 (9)0.0750 (10)0.0083 (7)−0.0177 (7)−0.0054 (8)
C100.0580 (8)0.0564 (8)0.0558 (9)0.0014 (7)−0.0214 (7)−0.0070 (7)
C110.0437 (7)0.0491 (7)0.0576 (8)−0.0049 (6)−0.0165 (6)−0.0147 (6)
C210.0447 (7)0.0457 (7)0.0514 (8)−0.0041 (5)0.0035 (6)−0.0218 (6)
C220.0416 (6)0.0521 (7)0.0424 (7)−0.0079 (5)−0.0061 (5)−0.0198 (6)
C230.0473 (8)0.0730 (10)0.0633 (9)−0.0085 (7)0.0044 (7)−0.0234 (8)
C240.0555 (9)0.1198 (17)0.0688 (11)−0.0296 (10)0.0128 (8)−0.0266 (11)
C250.0843 (13)0.1211 (17)0.0583 (10)−0.0573 (13)−0.0036 (9)0.0001 (11)
C260.0897 (13)0.0735 (11)0.0731 (11)−0.0277 (10)−0.0196 (10)0.0070 (9)
C270.0603 (9)0.0583 (9)0.0593 (9)−0.0069 (7)−0.0090 (7)−0.0114 (7)
C310.0298 (5)0.0352 (6)0.0416 (6)−0.0066 (4)0.0021 (5)−0.0121 (5)
C320.0416 (6)0.0363 (6)0.0458 (7)−0.0043 (5)−0.0034 (5)−0.0146 (5)
C330.0480 (7)0.0489 (7)0.0423 (7)−0.0089 (6)−0.0038 (5)−0.0133 (6)
C340.0421 (7)0.0531 (7)0.0489 (7)−0.0151 (6)0.0079 (5)−0.0262 (6)
C350.0503 (7)0.0394 (7)0.0584 (8)−0.0057 (5)0.0074 (6)−0.0219 (6)
C360.0415 (6)0.0364 (6)0.0475 (7)−0.0043 (5)0.0033 (5)−0.0117 (5)
C370.0974 (13)0.0970 (13)0.0560 (10)−0.0224 (11)−0.0081 (9)−0.0384 (10)
N10.0385 (6)0.0780 (9)0.0695 (8)0.0018 (6)−0.0126 (6)−0.0316 (7)
N20.0364 (5)0.0562 (6)0.0435 (6)0.0055 (5)−0.0036 (4)−0.0196 (5)
N30.0380 (5)0.0348 (5)0.0433 (6)−0.0025 (4)−0.0067 (4)−0.0119 (4)
O10.0726 (7)0.0731 (7)0.0567 (6)−0.0153 (5)0.0037 (5)−0.0381 (5)
C1—N11.1407 (16)C21—H21B0.9700
C1—C21.4242 (16)C22—C231.3763 (19)
C2—C31.4024 (15)C22—C271.377 (2)
C2—C61.4076 (16)C23—C241.377 (2)
C3—C41.3935 (16)C23—H230.9300
C3—C311.4848 (16)C24—C251.363 (3)
C4—C51.3935 (17)C24—H240.9300
C4—C71.5052 (15)C25—C261.368 (3)
C5—N31.3390 (14)C25—H250.9300
C5—C111.5029 (16)C26—C271.373 (2)
C6—N31.3367 (15)C26—H260.9300
C6—N21.3502 (14)C27—H270.9300
C7—C81.5307 (17)C31—C321.3794 (17)
C7—H7A0.9700C31—C361.3936 (16)
C7—H7B0.9700C32—C331.3809 (17)
C8—C91.510 (2)C32—H320.9300
C8—H8A0.9700C33—C341.3778 (18)
C8—H8B0.9700C33—H330.9300
C9—C101.517 (2)C34—O11.3618 (15)
C9—H9A0.9700C34—C351.3800 (19)
C9—H9B0.9700C35—C361.3704 (18)
C10—C111.5283 (18)C35—H350.9300
C10—H10A0.9700C36—H360.9300
C10—H10B0.9700C37—O11.410 (2)
C11—H11A0.9700C37—H37A0.9600
C11—H11B0.9700C37—H37B0.9600
C21—N21.4422 (16)C37—H37C0.9600
C21—C221.5007 (18)N2—H20.8600
C21—H21A0.9700
N1—C1—C2174.35 (13)C22—C21—H21B108.9
C3—C2—C6120.54 (10)H21A—C21—H21B107.7
C3—C2—C1122.31 (10)C23—C22—C27118.53 (13)
C6—C2—C1117.08 (10)C23—C22—C21121.14 (12)
C4—C3—C2117.51 (10)C27—C22—C21120.32 (12)
C4—C3—C31123.69 (10)C22—C23—C24120.32 (16)
C2—C3—C31118.80 (10)C22—C23—H23119.8
C3—C4—C5118.10 (10)C24—C23—H23119.8
C3—C4—C7122.90 (11)C25—C24—C23120.59 (17)
C5—C4—C7118.97 (10)C25—C24—H24119.7
N3—C5—C4124.47 (10)C23—C24—H24119.7
N3—C5—C11114.61 (11)C24—C25—C26119.55 (16)
C4—C5—C11120.92 (10)C24—C25—H25120.2
N3—C6—N2118.40 (10)C26—C25—H25120.2
N3—C6—C2121.02 (10)C25—C26—C27120.14 (17)
N2—C6—C2120.58 (10)C25—C26—H26119.9
C4—C7—C8112.62 (10)C27—C26—H26119.9
C4—C7—H7A109.1C26—C27—C22120.86 (15)
C8—C7—H7A109.1C26—C27—H27119.6
C4—C7—H7B109.1C22—C27—H27119.6
C8—C7—H7B109.1C32—C31—C36117.32 (11)
H7A—C7—H7B107.8C32—C31—C3120.14 (10)
C9—C8—C7113.46 (12)C36—C31—C3122.52 (11)
C9—C8—H8A108.9C31—C32—C33121.92 (11)
C7—C8—H8A108.9C31—C32—H32119.0
C9—C8—H8B108.9C33—C32—H32119.0
C7—C8—H8B108.9C34—C33—C32119.68 (12)
H8A—C8—H8B107.7C34—C33—H33120.2
C8—C9—C10115.00 (11)C32—C33—H33120.2
C8—C9—H9A108.5O1—C34—C33124.34 (13)
C10—C9—H9A108.5O1—C34—C35116.29 (12)
C8—C9—H9B108.5C33—C34—C35119.38 (12)
C10—C9—H9B108.5C36—C35—C34120.43 (11)
H9A—C9—H9B107.5C36—C35—H35119.8
C9—C10—C11115.37 (13)C34—C35—H35119.8
C9—C10—H10A108.4C35—C36—C31121.27 (12)
C11—C10—H10A108.4C35—C36—H36119.4
C9—C10—H10B108.4C31—C36—H36119.4
C11—C10—H10B108.4O1—C37—H37A109.5
H10A—C10—H10B107.5O1—C37—H37B109.5
C5—C11—C10114.29 (11)H37A—C37—H37B109.5
C5—C11—H11A108.7O1—C37—H37C109.5
C10—C11—H11A108.7H37A—C37—H37C109.5
C5—C11—H11B108.7H37B—C37—H37C109.5
C10—C11—H11B108.7C6—N2—C21125.66 (11)
H11A—C11—H11B107.6C6—N2—H2117.2
N2—C21—C22113.29 (10)C21—N2—H2117.2
N2—C21—H21A108.9C6—N3—C5118.31 (10)
C22—C21—H21A108.9C34—O1—C37117.32 (12)
N2—C21—H21B108.9
C6—C2—C3—C41.68 (15)C23—C24—C25—C26−0.7 (3)
C1—C2—C3—C4−175.20 (10)C24—C25—C26—C270.9 (3)
C6—C2—C3—C31−177.87 (10)C25—C26—C27—C22−0.1 (3)
C1—C2—C3—C315.26 (16)C23—C22—C27—C26−1.1 (2)
C2—C3—C4—C50.20 (15)C21—C22—C27—C26177.95 (14)
C31—C3—C4—C5179.73 (10)C4—C3—C31—C32−130.14 (12)
C2—C3—C4—C7178.13 (10)C2—C3—C31—C3249.38 (14)
C31—C3—C4—C7−2.35 (17)C4—C3—C31—C3651.31 (16)
C3—C4—C5—N3−0.95 (17)C2—C3—C31—C36−129.17 (12)
C7—C4—C5—N3−178.96 (10)C36—C31—C32—C330.64 (17)
C3—C4—C5—C11178.41 (10)C3—C31—C32—C33−177.98 (10)
C7—C4—C5—C110.40 (16)C31—C32—C33—C340.14 (19)
C3—C2—C6—N3−3.01 (16)C32—C33—C34—O1178.99 (11)
C1—C2—C6—N3174.02 (10)C32—C33—C34—C35−0.84 (18)
C3—C2—C6—N2177.46 (10)O1—C34—C35—C36−179.08 (11)
C1—C2—C6—N2−5.51 (16)C33—C34—C35—C360.76 (19)
C3—C4—C7—C8−109.94 (13)C34—C35—C36—C310.04 (19)
C5—C4—C7—C867.96 (14)C32—C31—C36—C35−0.73 (17)
C4—C7—C8—C9−84.84 (14)C3—C31—C36—C35177.86 (11)
C7—C8—C9—C1062.48 (17)N3—C6—N2—C21−0.36 (18)
C8—C9—C10—C11−59.44 (18)C2—C6—N2—C21179.18 (11)
N3—C5—C11—C10113.46 (13)C22—C21—N2—C6−102.67 (14)
C4—C5—C11—C10−65.96 (16)N2—C6—N3—C5−178.20 (10)
C9—C10—C11—C578.27 (16)C2—C6—N3—C52.26 (16)
N2—C21—C22—C23−122.40 (13)C4—C5—N3—C6−0.30 (16)
N2—C21—C22—C2758.62 (16)C11—C5—N3—C6−179.69 (10)
C27—C22—C23—C241.3 (2)C33—C34—O1—C37−6.89 (19)
C21—C22—C23—C24−177.67 (14)C35—C34—O1—C37172.95 (13)
C22—C23—C24—C25−0.5 (3)
D—H···AD—HH···AD···AD—H···A
N2—H2···N1i0.862.283.0168 (15)145
C35—H35···Cg1ii0.932.993.5559 (14)121
  6 in total

1.  Synthesis and antihistaminic activity of 2-guanadino-3-cyanopyridines and pyrido[2,3-d]-pyrimidines.

Authors:  J M Quintela; C Peinador; L Botana; M Estévez; R Riguera
Journal:  Bioorg Med Chem       Date:  1997-08       Impact factor: 3.641

2.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

3.  The Cambridge Structural Database in retrospect and prospect.

Authors:  Colin R Groom; Frank H Allen
Journal:  Angew Chem Int Ed Engl       Date:  2014-01-02       Impact factor: 15.336

4.  2-Amino-6-furan-2-yl-4-substituted nicotinonitriles as A2A adenosine receptor antagonists.

Authors:  Monica Mantri; Olivier de Graaf; Jacobus van Veldhoven; Anikó Göblyös; Jacobien K von Frijtag Drabbe Künzel; Thea Mulder-Krieger; Regina Link; Henk de Vries; Margot W Beukers; Johannes Brussee; Adriaan P Ijzerman
Journal:  J Med Chem       Date:  2008-07-19       Impact factor: 7.446

5.  2-(4-Bromo-phen-yl)-4-(4-meth-oxy-phen-yl)-6,7,8,9-tetra-hydro-5H-cyclo-hepta-[b]pyridine.

Authors:  Ismail Celik; Mehmet Akkurt; Hayreddin Gezegen; Canan Kazak
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2013-05-25

6.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
  6 in total

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