Literature DB >> 21200905

(1R,4R,5R)-1,3,4-Triphenyl-7-[(R)-1-phenyl-ethyl]-2-oxa-3,7-diaza-spiro-[4.5]decan-10-one.

A Malathy, R Suresh Kumar, S Perumal, J Suresh, Nilantha Lakshman.   

Abstract

In the title compound, C(33)H(32)N(2)O(2), the polysubstituted piperidine ring adopts a chair conformation. The isoxazolidine ring is in an envelope conformation. In the crystal structure, intra- and inter-molecular C-H⋯π inter-actions involving the phenyl rings are observed.

Entities:  

Year:  2007        PMID: 21200905      PMCID: PMC2915384          DOI: 10.1107/S1600536807067256

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


Related literature

For related literature, see: Ali Dondas et al. (2001 ▶); Alibés et al. (2003 ▶); Blanarikova-Hlobilova et al. (2003 ▶); Carda et al. (2000 ▶); Carruthers (1990 ▶); Herrera et al. (2001 ▶); Huisgen (1963 ▶); Ishar et al. (2000 ▶). For ring puckering parameters, see: Cremer & Pople (1975 ▶).

Experimental

Crystal data

C33H32N2O2 M = 488.61 Orthorhombic, a = 10.589 (5) Å b = 14.582 (7) Å c = 17.443 (8) Å V = 2693 (2) Å3 Z = 4 Mo Kα radiation μ = 0.08 mm−1 T = 273 (2) K 0.20 × 0.16 × 0.12 mm

Data collection

Nonius MACH-3 diffractometer Absorption correction: ψ scan (North et al., 1968 ▶) T min = 0.986, T max = 0.991 13617 measured reflections 2701 independent reflections 1899 reflections with I > 2σ(I) R int = 0.074 2 standard reflections frequency: 60 min intensity decay: none

Refinement

R[F 2 > 2σ(F 2)] = 0.065 wR(F 2) = 0.118 S = 1.09 2701 reflections 335 parameters H-atom parameters constrained Δρmax = 0.16 e Å−3 Δρmin = −0.14 e Å−3 Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994 ▶); cell refinement: CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1996 ▶); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997 ▶); molecular graphics: PLATON (Spek, 2003 ▶); software used to prepare material for publication: SHELXL97. Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536807067256/ci2540sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536807067256/ci2540Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C33H32N2O2F000 = 1040
Mr = 488.61Dx = 1.205 Mg m3
Orthorhombic, P212121Mo Kα radiation λ = 0.71073 Å
Hall symbol: P 2ac 2abCell parameters from 25 reflections
a = 10.589 (5) Åθ = 2–25º
b = 14.582 (7) ŵ = 0.08 mm1
c = 17.443 (8) ÅT = 273 (2) K
V = 2693 (2) Å3Needle, colourless
Z = 40.20 × 0.16 × 0.12 mm
Nonius MACH-3 diffractometerRint = 0.074
Radiation source: fine-focus sealed tubeθmax = 25.0º
Monochromator: graphiteθmin = 1.8º
T = 273(2) Kh = −12→11
ω/2θ scansk = −17→16
Absorption correction: ψ scan(North et al., 1968)l = −20→20
Tmin = 0.986, Tmax = 0.9912 standard reflections
13617 measured reflections every 60 min
2701 independent reflections intensity decay: none
1899 reflections with I > 2σ(I)
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.065H-atom parameters constrained
wR(F2) = 0.118  w = 1/[σ2(Fo2) + (0.0519P)2] where P = (Fo2 + 2Fc2)/3
S = 1.09(Δ/σ)max < 0.001
2701 reflectionsΔρmax = 0.16 e Å3
335 parametersΔρmin = −0.14 e Å3
Primary atom site location: structure-invariant direct methodsExtinction correction: none
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.
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.
xyzUiso*/Ueq
C20.1883 (4)0.3386 (3)0.0817 (2)0.0554 (11)
H2A0.12600.29380.09780.066*
H2B0.18960.33990.02610.066*
C30.1521 (4)0.4324 (3)0.1120 (2)0.0544 (11)
H3A0.20060.47840.08470.065*
H3B0.06360.44300.10070.065*
C40.1724 (4)0.4453 (3)0.1961 (2)0.0443 (10)
C50.2865 (3)0.3966 (2)0.2314 (2)0.0390 (9)
C60.3004 (4)0.3021 (2)0.1937 (2)0.0428 (10)
H6A0.37430.27130.21420.051*
H6B0.22690.26490.20540.051*
C70.4141 (4)0.4506 (2)0.22225 (19)0.0406 (9)
H70.47730.40890.20060.049*
C80.2734 (4)0.3908 (3)0.3199 (2)0.0438 (10)
H80.22650.44440.33820.053*
C90.3577 (4)0.2247 (3)0.0750 (2)0.0481 (11)
H90.30310.17480.09280.058*
C100.4920 (4)0.2034 (3)0.0992 (2)0.0643 (13)
H10A0.49450.19320.15350.096*
H10B0.54570.25420.08640.096*
H10C0.52080.14940.07300.096*
C210.5823 (4)0.4778 (2)0.31879 (19)0.0383 (9)
C220.6625 (4)0.5250 (3)0.2706 (2)0.0528 (10)
H220.63050.55060.22580.063*
C230.7890 (4)0.5351 (3)0.2874 (2)0.0562 (11)
H230.84110.56800.25440.067*
C240.8378 (4)0.4969 (3)0.3523 (3)0.0617 (12)
H240.92330.50270.36350.074*
C250.7593 (5)0.4500 (3)0.4008 (3)0.0723 (14)
H250.79210.42390.44520.087*
C260.6322 (4)0.4408 (3)0.3848 (2)0.0590 (12)
H260.58000.40960.41880.071*
C710.4083 (4)0.5349 (3)0.1730 (2)0.0429 (9)
C720.4473 (4)0.5300 (3)0.0971 (2)0.0573 (12)
H720.48420.47640.07880.069*
C730.4319 (5)0.6035 (4)0.0490 (3)0.0742 (14)
H730.45650.5987−0.00210.089*
C740.3810 (5)0.6836 (4)0.0748 (3)0.0781 (16)
H740.36960.73290.04170.094*
C750.3467 (4)0.6905 (3)0.1509 (3)0.0673 (13)
H750.31500.74560.16960.081*
C760.3589 (4)0.6165 (3)0.1994 (2)0.0523 (11)
H760.33360.62160.25020.063*
C810.2124 (4)0.3053 (3)0.3508 (2)0.0453 (10)
C820.2819 (4)0.2315 (3)0.3763 (2)0.0559 (12)
H820.36960.23500.37670.067*
C830.2234 (5)0.1530 (3)0.4014 (3)0.0680 (14)
H830.27180.10370.41820.082*
C840.0949 (6)0.1466 (4)0.4019 (2)0.0737 (15)
H840.05590.09330.41910.088*
C850.0232 (5)0.2193 (4)0.3767 (3)0.0758 (15)
H85−0.06440.21530.37660.091*
C860.0824 (4)0.2987 (3)0.3515 (2)0.0571 (12)
H860.03390.34810.33490.068*
C910.3510 (4)0.2279 (3)−0.0116 (2)0.0496 (11)
C920.3106 (5)0.1525 (3)−0.0517 (3)0.0711 (14)
H920.28240.1011−0.02530.085*
C930.3112 (6)0.1519 (5)−0.1306 (3)0.099 (2)
H930.28460.0998−0.15680.119*
C940.3506 (6)0.2269 (6)−0.1706 (3)0.103 (2)
H940.35130.2259−0.22390.124*
C950.3891 (5)0.3036 (5)−0.1320 (3)0.0862 (17)
H950.41330.3559−0.15880.103*
C960.3919 (4)0.3029 (4)−0.0530 (2)0.0661 (13)
H960.42210.3542−0.02700.079*
N10.3132 (3)0.3116 (2)0.11050 (15)0.0403 (8)
N20.4506 (3)0.4721 (2)0.30247 (16)0.0423 (8)
O10.1026 (3)0.4923 (2)0.23424 (16)0.0660 (8)
O20.4005 (2)0.39618 (18)0.34690 (13)0.0483 (7)
U11U22U33U12U13U23
C20.045 (3)0.080 (3)0.041 (2)0.002 (3)−0.006 (2)−0.009 (2)
C30.037 (2)0.071 (3)0.055 (3)0.007 (2)−0.009 (2)0.000 (2)
C40.039 (2)0.043 (2)0.051 (3)−0.004 (2)0.004 (2)0.002 (2)
C50.041 (2)0.041 (2)0.035 (2)−0.001 (2)0.0020 (17)0.0005 (18)
C60.044 (2)0.042 (2)0.042 (2)0.001 (2)0.0011 (19)−0.0026 (19)
C70.040 (2)0.046 (2)0.036 (2)0.000 (2)0.0019 (18)−0.0049 (19)
C80.042 (2)0.051 (2)0.039 (2)−0.002 (2)0.0009 (18)−0.007 (2)
C90.059 (3)0.049 (2)0.036 (2)−0.006 (2)0.007 (2)−0.0012 (19)
C100.074 (3)0.074 (3)0.044 (3)0.025 (3)0.009 (2)−0.002 (2)
C210.045 (2)0.037 (2)0.033 (2)0.000 (2)−0.0034 (19)−0.0061 (18)
C220.050 (3)0.070 (3)0.038 (2)−0.001 (2)0.000 (2)0.003 (2)
C230.053 (3)0.064 (3)0.052 (3)−0.006 (2)0.005 (2)−0.001 (2)
C240.046 (3)0.068 (3)0.071 (3)−0.004 (3)−0.007 (2)−0.002 (3)
C250.066 (3)0.083 (3)0.068 (3)−0.002 (3)−0.025 (3)0.015 (3)
C260.060 (3)0.065 (3)0.052 (3)−0.011 (2)−0.005 (2)0.015 (2)
C710.041 (2)0.046 (2)0.042 (2)−0.007 (2)−0.0045 (19)0.002 (2)
C720.069 (3)0.062 (3)0.041 (3)−0.009 (2)−0.001 (2)0.007 (2)
C730.085 (4)0.090 (4)0.048 (3)−0.012 (3)−0.003 (3)0.017 (3)
C740.072 (4)0.082 (4)0.080 (4)−0.012 (3)−0.011 (3)0.040 (3)
C750.060 (3)0.059 (3)0.084 (4)0.001 (3)−0.005 (3)0.016 (3)
C760.050 (3)0.056 (3)0.050 (3)−0.007 (2)0.001 (2)0.006 (2)
C810.051 (3)0.056 (3)0.029 (2)−0.004 (2)0.0061 (19)−0.005 (2)
C820.055 (3)0.063 (3)0.050 (3)−0.002 (3)0.009 (2)0.005 (2)
C830.087 (4)0.060 (3)0.056 (3)−0.003 (3)0.005 (3)0.006 (3)
C840.095 (4)0.071 (3)0.055 (3)−0.034 (4)0.010 (3)−0.002 (3)
C850.058 (3)0.104 (4)0.066 (3)−0.024 (3)0.002 (3)−0.005 (3)
C860.049 (3)0.071 (3)0.051 (3)−0.004 (3)0.003 (2)0.001 (2)
C910.051 (3)0.061 (3)0.037 (2)0.008 (2)0.002 (2)−0.005 (2)
C920.084 (4)0.068 (3)0.061 (3)0.006 (3)−0.009 (3)−0.024 (3)
C930.105 (5)0.125 (5)0.068 (4)0.033 (5)−0.027 (4)−0.047 (4)
C940.105 (5)0.165 (7)0.040 (3)0.061 (5)−0.010 (3)−0.012 (4)
C950.086 (4)0.122 (5)0.050 (4)0.025 (4)0.010 (3)0.024 (3)
C960.070 (3)0.084 (3)0.044 (3)0.008 (3)0.004 (2)0.004 (3)
N10.0415 (19)0.0506 (18)0.0287 (18)0.0008 (17)−0.0027 (14)−0.0007 (15)
N20.050 (2)0.0451 (19)0.0324 (18)−0.0084 (16)0.0004 (14)0.0052 (16)
O10.0558 (18)0.073 (2)0.0693 (19)0.0207 (17)0.0077 (16)−0.0070 (17)
O20.0513 (17)0.0588 (17)0.0346 (14)−0.0115 (15)−0.0023 (13)0.0056 (14)
C2—N11.468 (5)C25—C261.382 (6)
C2—C31.515 (5)C25—H250.93
C2—H2A0.97C26—H260.93
C2—H2B0.97C71—C761.379 (5)
C3—C41.495 (5)C71—C721.388 (5)
C3—H3A0.97C72—C731.372 (6)
C3—H3B0.97C72—H720.93
C4—O11.208 (4)C73—C741.363 (7)
C4—C51.530 (5)C73—H730.93
C5—C61.534 (5)C74—C751.379 (6)
C5—C81.552 (5)C74—H740.93
C5—C71.572 (5)C75—C761.376 (5)
C6—N11.465 (4)C75—H750.93
C6—H6A0.97C76—H760.93
C6—H6B0.97C81—C821.378 (5)
C7—N21.485 (4)C81—C861.380 (5)
C7—C711.502 (5)C82—C831.374 (6)
C7—H70.98C82—H820.93
C8—O21.428 (4)C83—C841.364 (7)
C8—C811.503 (5)C83—H830.93
C8—H80.98C84—C851.375 (7)
C9—N11.488 (5)C84—H840.93
C9—C911.512 (5)C85—C861.388 (6)
C9—C101.516 (6)C85—H850.93
C9—H90.98C86—H860.93
C10—H10A0.96C91—C921.372 (5)
C10—H10B0.96C91—C961.381 (6)
C10—H10C0.96C92—C931.375 (6)
C21—C261.376 (5)C92—H920.93
C21—C221.379 (5)C93—C941.363 (8)
C21—N21.425 (4)C93—H930.93
C22—C231.380 (6)C94—C951.369 (8)
C22—H220.93C94—H940.93
C23—C241.365 (5)C95—C961.378 (6)
C23—H230.93C95—H950.93
C24—C251.369 (6)C96—H960.93
C24—H240.93N2—O21.452 (4)
N1—C2—C3110.5 (3)C26—C25—H25119.5
N1—C2—H2A109.5C21—C26—C25120.4 (4)
C3—C2—H2A109.5C21—C26—H26119.8
N1—C2—H2B109.5C25—C26—H26119.8
C3—C2—H2B109.5C76—C71—C72118.4 (4)
H2A—C2—H2B108.1C76—C71—C7122.1 (3)
C4—C3—C2114.8 (3)C72—C71—C7119.4 (4)
C4—C3—H3A108.6C73—C72—C71120.5 (4)
C2—C3—H3A108.6C73—C72—H72119.8
C4—C3—H3B108.6C71—C72—H72119.8
C2—C3—H3B108.6C74—C73—C72120.9 (4)
H3A—C3—H3B107.5C74—C73—H73119.5
O1—C4—C3121.5 (4)C72—C73—H73119.5
O1—C4—C5121.7 (4)C73—C74—C75119.0 (4)
C3—C4—C5116.7 (3)C73—C74—H74120.5
C4—C5—C6108.7 (3)C75—C74—H74120.5
C4—C5—C8110.8 (3)C76—C75—C74120.6 (5)
C6—C5—C8112.7 (3)C76—C75—H75119.7
C4—C5—C7113.9 (3)C74—C75—H75119.7
C6—C5—C7108.9 (3)C75—C76—C71120.5 (4)
C8—C5—C7101.9 (3)C75—C76—H76119.8
N1—C6—C5110.4 (3)C71—C76—H76119.8
N1—C6—H6A109.6C82—C81—C86118.4 (4)
C5—C6—H6A109.6C82—C81—C8122.2 (4)
N1—C6—H6B109.6C86—C81—C8119.3 (4)
C5—C6—H6B109.6C83—C82—C81120.8 (4)
H6A—C6—H6B108.1C83—C82—H82119.6
N2—C7—C71112.1 (3)C81—C82—H82119.6
N2—C7—C5103.5 (3)C84—C83—C82120.6 (5)
C71—C7—C5115.7 (3)C84—C83—H83119.7
N2—C7—H7108.4C82—C83—H83119.7
C71—C7—H7108.4C83—C84—C85119.7 (5)
C5—C7—H7108.4C83—C84—H84120.1
O2—C8—C81109.4 (3)C85—C84—H84120.1
O2—C8—C5103.9 (3)C84—C85—C86119.7 (5)
C81—C8—C5116.1 (3)C84—C85—H85120.2
O2—C8—H8109.0C86—C85—H85120.2
C81—C8—H8109.0C81—C86—C85120.7 (5)
C5—C8—H8109.0C81—C86—H86119.6
N1—C9—C91112.0 (3)C85—C86—H86119.6
N1—C9—C10110.8 (3)C92—C91—C96117.7 (4)
C91—C9—C10109.2 (3)C92—C91—C9120.0 (4)
N1—C9—H9108.3C96—C91—C9122.2 (4)
C91—C9—H9108.3C91—C92—C93121.0 (5)
C10—C9—H9108.3C91—C92—H92119.5
C9—C10—H10A109.5C93—C92—H92119.5
C9—C10—H10B109.5C94—C93—C92120.6 (6)
H10A—C10—H10B109.5C94—C93—H93119.7
C9—C10—H10C109.5C92—C93—H93119.7
H10A—C10—H10C109.5C93—C94—C95119.6 (5)
H10B—C10—H10C109.5C93—C94—H94120.2
C26—C21—C22117.9 (4)C95—C94—H94120.2
C26—C21—N2121.3 (4)C94—C95—C96119.6 (6)
C22—C21—N2120.6 (3)C94—C95—H95120.2
C21—C22—C23121.5 (4)C96—C95—H95120.2
C21—C22—H22119.2C95—C96—C91121.5 (5)
C23—C22—H22119.2C95—C96—H96119.3
C24—C23—C22120.0 (4)C91—C96—H96119.3
C24—C23—H23120.0C6—N1—C2106.3 (3)
C22—C23—H23120.0C6—N1—C9111.2 (3)
C23—C24—C25119.2 (4)C2—N1—C9111.8 (3)
C23—C24—H24120.4C21—N2—O2107.2 (3)
C25—C24—H24120.4C21—N2—C7117.1 (3)
C24—C25—C26121.0 (4)O2—N2—C7104.3 (2)
C24—C25—H25119.5C8—O2—N2102.2 (3)
N1—C2—C3—C4−47.1 (5)O2—C8—C81—C82−21.0 (5)
C2—C3—C4—O1−145.8 (4)C5—C8—C81—C8296.2 (4)
C2—C3—C4—C534.6 (5)O2—C8—C81—C86161.1 (3)
O1—C4—C5—C6142.2 (3)C5—C8—C81—C86−81.7 (5)
C3—C4—C5—C6−38.3 (4)C86—C81—C82—C830.5 (6)
O1—C4—C5—C817.9 (5)C8—C81—C82—C83−177.4 (4)
C3—C4—C5—C8−162.6 (3)C81—C82—C83—C84−0.4 (7)
O1—C4—C5—C7−96.3 (4)C82—C83—C84—C850.3 (7)
C3—C4—C5—C783.3 (4)C83—C84—C85—C86−0.4 (7)
C4—C5—C6—N157.2 (4)C82—C81—C86—C85−0.6 (6)
C8—C5—C6—N1−179.7 (3)C8—C81—C86—C85177.4 (3)
C7—C5—C6—N1−67.4 (4)C84—C85—C86—C810.5 (7)
C4—C5—C7—N2116.1 (3)N1—C9—C91—C92−139.4 (4)
C6—C5—C7—N2−122.4 (3)C10—C9—C91—C9297.5 (5)
C8—C5—C7—N2−3.2 (3)N1—C9—C91—C9644.8 (5)
C4—C5—C7—C71−6.9 (4)C10—C9—C91—C96−78.4 (5)
C6—C5—C7—C71114.5 (3)C96—C91—C92—C930.2 (7)
C8—C5—C7—C71−126.3 (3)C9—C91—C92—C93−175.9 (4)
C4—C5—C8—O2−147.5 (3)C91—C92—C93—C94−0.9 (9)
C6—C5—C8—O290.5 (4)C92—C93—C94—C95−0.4 (9)
C7—C5—C8—O2−26.0 (4)C93—C94—C95—C962.3 (9)
C4—C5—C8—C8192.2 (4)C94—C95—C96—C91−3.1 (8)
C6—C5—C8—C81−29.7 (5)C92—C91—C96—C951.8 (7)
C7—C5—C8—C81−146.2 (3)C9—C91—C96—C95177.8 (4)
C26—C21—C22—C230.2 (6)C5—C6—N1—C2−71.9 (4)
N2—C21—C22—C23176.7 (4)C5—C6—N1—C9166.2 (3)
C21—C22—C23—C240.9 (6)C3—C2—N1—C664.9 (4)
C22—C23—C24—C25−1.0 (6)C3—C2—N1—C9−173.7 (3)
C23—C24—C25—C260.1 (7)C91—C9—N1—C6170.6 (3)
C22—C21—C26—C25−1.1 (6)C10—C9—N1—C6−67.2 (4)
N2—C21—C26—C25−177.6 (4)C91—C9—N1—C252.0 (4)
C24—C25—C26—C211.0 (7)C10—C9—N1—C2174.1 (3)
N2—C7—C71—C76−40.4 (5)C26—C21—N2—O2−21.8 (4)
C5—C7—C71—C7678.0 (4)C22—C21—N2—O2161.8 (3)
N2—C7—C71—C72143.3 (4)C26—C21—N2—C7−138.4 (3)
C5—C7—C71—C72−98.4 (4)C22—C21—N2—C745.2 (5)
C76—C71—C72—C73−2.7 (6)C71—C7—N2—C21−85.5 (4)
C7—C71—C72—C73173.8 (4)C5—C7—N2—C21149.1 (3)
C71—C72—C73—C741.6 (7)C71—C7—N2—O2156.3 (3)
C72—C73—C74—C751.0 (8)C5—C7—N2—O231.0 (3)
C73—C74—C75—C76−2.5 (7)C81—C8—O2—N2170.9 (3)
C74—C75—C76—C711.4 (7)C5—C8—O2—N246.2 (3)
C72—C71—C76—C751.2 (6)C21—N2—O2—C8−173.9 (3)
C7—C71—C76—C75−175.2 (4)C7—N2—O2—C8−49.1 (3)
D—H···AD—HH···AD···AD—H···A
C8—H8···O10.982.352.775 (5)106
C26—H26···O20.932.292.623 (5)101
C82—H82···O20.932.432.757 (5)101
C3—H3A···Cg10.972.903.659 (5)136
C2—H2A···Cg2i0.972.933.707 (5)138
C74—H74···Cg3ii0.932.963.722 (6)141
Table 1

Hydrogen-bond geometry (Å, °)

Cg1, Cg2 and Cg3 are the centroids of the phenyl rings C71–C76, C91–C96 and C81–C86, respectively.

D—H⋯AD—HH⋯ADAD—H⋯A
C8—H8⋯O10.982.352.775 (5)106
C26—H26⋯O20.932.292.623 (5)101
C82—H82⋯O20.932.432.757 (5)101
C3—H3ACg10.972.903.659 (5)136
C2—H2ACg2i0.972.933.707 (5)138
C74—H74⋯Cg3ii0.932.963.722 (6)141

Symmetry codes: (i) ; (ii) .

  2 in total

1.  Regio- and stereoselectivity of captodative olefins in 1,3-dipolar cycloadditions. A DFT/HSAB theory rationale for the observed regiochemistry of nitrones.

Authors:  R Herrera; A Nagarajan; M A Morales; F Méndez; H A Jiménez-Vázquez; L G Zepeda; J Tamariz
Journal:  J Org Chem       Date:  2001-02-23       Impact factor: 4.354

2.  Stereoselective 1,3-dipolar cycloadditions of a chiral nitrone derived from erythrulose. An experimental and DFT theoretical study

Authors: 
Journal:  J Org Chem       Date:  2000-10-20       Impact factor: 4.354

  2 in total

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