rac-[3-Hydroxy-6,9-dimethyl-6-(4-methylpent-3-en-1-yl)-6a,7,8,9,10,10a-hexahydro-6H-1,9-epoxybenzo[c]chromen-4-yl](phenyl)methanone.

The title compound congestiflorone, C(28)H(32)O(4), which was isolated from the stem bark of Mesua congestiflora, consists of a benzophenone skeleton with two attached pyran rings to which a cyclo-hexane ring and a C6 side chain are bonded. The benzene ring is significantly distorted from planarity (r.m.s. deviation = 0.0007 Å) due to the constraints imposed by junctions with the two pyran rings. The cyclo-hexane ring is in a chair conformation, one pyran ring is in a boat conformation, while the other is a distorted chair. The phenyl and benzene rings make a dihedral angle of 55.85 (9)°. An intra-molecular O-H⋯O hydrogen bond is observed. In the crystal, mol-ecules are linked via C-H⋯O inter-actions.

Related literature

For phytochemical investigations of Mesua congestiflora, see: Awang et al. (2010 ▶); Bala & Seshadri (1971 ▶); Ee et al. (2005b ▶); Bandaranayak et al. (1975 ▶); Morel et al. (1999 ▶); Walia & Mukerjee (1984 ▶). For the biological activity of Congestiflora species, see: Pinto et al. (1994 ▶); Ee et al. (2005a ▶); Mazumder et al. (2004 ▶); Verotta et al. (2004 ▶); Huerta-Reyes et al. (2004 ▶). For related structures, see: Hua et al. (2008 ▶); Liu et al. (2005 ▶). For a description of the Cambridge Structural Database, see Allen (2002 ▶)

Experimental

Crystal data

C28H32O4

M = 432.56

Triclinic,

a = 6.2022 (4) Å

b = 7.5220 (4) Å

c = 24.7673 (15) Å

α = 98.410 (5)°

β = 94.425 (5)°

γ = 94.200 (5)°

V = 1135.43 (12) Å3

Z = 2

Cu Kα radiation

μ = 0.66 mm−1

T = 150 K

0.29 × 0.09 × 0.05 mm

Data collection

Oxford Diffraction Gemin area-detector diffractometer

Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2006 ▶) T min = 0.942, T max = 0.968

15011 measured reflections

4340 independent reflections

3423 reflections with I > 2σ(I)

R int = 0.034

Refinement

R[F 2 > 2σ(F 2)] = 0.046

wR(F 2) = 0.117

S = 1.00

4321 reflections

289 parameters

H-atom parameters constrained

Δρmax = 0.39 e Å−3

Δρmin = −0.34 e Å−3

Data collection: CrysAlis CCD (Oxford Diffraction, 2006 ▶); cell refinement: CrysAlis CCD; data reduction: CrysAlis RED (Oxford Diffraction, 2006 ▶); program(s) used to solve structure: SIR92 (Altomare et al., 1994 ▶); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003 ▶); molecular graphics: Mercury (Macrae et al., 2006 ▶); software used to prepare material for publication: CRYSTALS.

Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536812010756/kp2392sup1.cif

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536812010756/kp2392Isup2.hkl

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

C28H32O4	Z = 2
Mr = 432.56	F(000) = 464
Triclinic, P1	Dx = 1.265 Mg m−3
Hall symbol: -P 1	Melting point: 483 K
a = 6.2022 (4) Å	Cu Kα radiation, λ = 1.54180 Å
b = 7.5220 (4) Å	Cell parameters from 4627 reflections
c = 24.7673 (15) Å	θ = 4–71°
α = 98.410 (5)°	µ = 0.66 mm−1
β = 94.425 (5)°	T = 150 K
γ = 94.200 (5)°	Needle, yellow
V = 1135.43 (12) Å3	0.29 × 0.09 × 0.05 mm

Oxford Diffraction Gemin area-detector diffractometer	4340 independent reflections
Radiation source: sealed x-ray tube	3423 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.034
ω/2θ scans	θmax = 71.2°, θmin = 3.6°
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2006)	h = −7→7
Tmin = 0.942, Tmax = 0.968	k = −9→9
15011 measured reflections	l = −30→30

Refinement on F2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.046	H-atom parameters constrained
wR(F2) = 0.117	Method = Modified Sheldrick w = 1/[σ2(F2) + ( 0.05P)2 + 0.61P], where P = (max(Fo2,0) + 2Fc2)/3
S = 1.00	(Δ/σ)max = 0.001
4321 reflections	Δρmax = 0.39 e Å−3
289 parameters	Δρmin = −0.34 e Å−3
0 restraints

Refinement. For this compound, 15011 numbers of reflections were collected and measured during the refinement. Symmetry related reflections were measured more than once and after merging the symmetry equivalent reflections there were only 4340 reflection left. 19 more reflections were filtered, as σ cutoff was set as -3 and (sinθ/x)set to>0.01 (to eliminate reflection measured near the vicinity of beam stop) therefore numbers of reflection reduced to 4321.

	x	y	z	Uiso*/Ueq
O1	1.3916 (2)	0.62936 (17)	0.77877 (5)	0.0320
C2	1.2067 (3)	0.5510 (2)	0.76653 (7)	0.0250
C3	1.1384 (3)	0.4954 (2)	0.70701 (7)	0.0263
C4	0.9367 (3)	0.5313 (2)	0.68404 (8)	0.0291
C5	0.8872 (3)	0.4939 (3)	0.62773 (8)	0.0365
C6	1.0351 (4)	0.4162 (3)	0.59461 (8)	0.0431
C7	1.2346 (4)	0.3778 (3)	0.61725 (9)	0.0447
C8	1.2880 (3)	0.4204 (3)	0.67332 (8)	0.0355
C9	1.0615 (3)	0.5227 (2)	0.80880 (7)	0.0235
C10	1.1140 (3)	0.6170 (2)	0.86326 (7)	0.0255
O11	1.2907 (2)	0.73655 (17)	0.87537 (5)	0.0336
C12	0.9944 (3)	0.5844 (2)	0.90629 (7)	0.0267
C13	0.8146 (3)	0.4582 (2)	0.89609 (7)	0.0239
O14	0.7243 (2)	0.40329 (16)	0.93968 (5)	0.0282
C15	0.5848 (3)	0.2316 (2)	0.92940 (7)	0.0255
C16	0.7221 (3)	0.0698 (2)	0.91977 (7)	0.0263
C17	0.8289 (3)	0.0419 (2)	0.86545 (7)	0.0251
C18	0.6761 (3)	0.0648 (2)	0.81520 (7)	0.0224
C19	0.7858 (3)	0.0839 (2)	0.76156 (7)	0.0235
O20	0.82634 (19)	0.27776 (16)	0.75412 (5)	0.0252
C21	0.8751 (3)	0.3983 (2)	0.80136 (7)	0.0220
C22	0.7405 (3)	0.3818 (2)	0.84248 (7)	0.0222
C23	0.5588 (3)	0.2361 (2)	0.82988 (7)	0.0217
C24	0.4288 (3)	0.2301 (2)	0.87914 (7)	0.0252
C25	0.6276 (3)	0.0004 (2)	0.71244 (7)	0.0263
C26	0.6933 (3)	0.0294 (3)	0.65592 (8)	0.0363
C27	0.5303 (3)	−0.0667 (3)	0.61092 (8)	0.0320
C28	0.5695 (3)	−0.1476 (3)	0.56176 (7)	0.0294
C29	0.3899 (3)	−0.2423 (3)	0.52118 (8)	0.0404
C30	0.7924 (3)	−0.1539 (3)	0.54199 (9)	0.0430
C31	1.0059 (3)	0.0067 (3)	0.75961 (8)	0.0304
C32	0.4671 (3)	0.2328 (3)	0.98082 (8)	0.0319
H41	0.8314	0.5832	0.7073	0.0367*
H51	0.7488	0.5234	0.6122	0.0454*
H61	0.9999	0.3875	0.5557	0.0533*
H71	1.3367	0.3232	0.5942	0.0547*
H81	1.4295	0.3981	0.6891	0.0457*
H121	1.0361	0.6440	0.9423	0.0345*
H161	0.8374	0.0796	0.9503	0.0335*
H162	0.6217	−0.0382	0.9209	0.0328*
H171	0.9603	0.1294	0.8679	0.0317*
H172	0.8805	−0.0812	0.8599	0.0324*
H181	0.5662	−0.0425	0.8070	0.0291*
H231	0.4619	0.2584	0.7977	0.0269*
H241	0.3411	0.3350	0.8846	0.0319*
H242	0.3299	0.1190	0.8740	0.0317*
H251	0.6091	−0.1324	0.7137	0.0342*
H252	0.4852	0.0508	0.7176	0.0341*
H261	0.8365	−0.0145	0.6505	0.0461*
H262	0.7055	0.1603	0.6535	0.0467*
H271	0.3814	−0.0696	0.6200	0.0408*
H291	0.3915	−0.1929	0.4867	0.0632*
H292	0.4065	−0.3713	0.5141	0.0633*
H293	0.2496	−0.2260	0.5358	0.0628*
H301	0.7949	−0.1071	0.5070	0.0677*
H302	0.8301	−0.2777	0.5363	0.0685*
H303	0.9008	−0.0786	0.5679	0.0685*
H311	1.0584	0.0141	0.7238	0.0482*
H312	1.1094	0.0772	0.7879	0.0485*
H313	0.9902	−0.1190	0.7658	0.0489*
H323	0.3689	0.1245	0.9770	0.0491*
H322	0.5668	0.2357	1.0134	0.0499*
H321	0.3815	0.3378	0.9856	0.0494*
H111	1.3748	0.7225	0.8486	0.0530*

	U11	U22	U33	U12	U13	U23
O1	0.0270 (7)	0.0331 (7)	0.0343 (7)	−0.0087 (6)	0.0017 (5)	0.0060 (6)
C2	0.0252 (9)	0.0171 (9)	0.0327 (10)	−0.0010 (7)	0.0009 (7)	0.0060 (7)
C3	0.0282 (9)	0.0220 (9)	0.0289 (9)	−0.0045 (7)	0.0043 (7)	0.0067 (7)
C4	0.0316 (10)	0.0255 (10)	0.0307 (10)	−0.0008 (8)	0.0052 (8)	0.0064 (8)
C5	0.0369 (11)	0.0391 (12)	0.0333 (11)	−0.0020 (9)	−0.0017 (8)	0.0103 (9)
C6	0.0479 (13)	0.0531 (14)	0.0259 (10)	−0.0068 (11)	0.0022 (9)	0.0043 (9)
C7	0.0419 (12)	0.0568 (14)	0.0341 (11)	0.0006 (10)	0.0143 (9)	−0.0010 (10)
C8	0.0297 (10)	0.0410 (12)	0.0356 (11)	0.0000 (9)	0.0073 (8)	0.0046 (9)
C9	0.0252 (9)	0.0196 (9)	0.0257 (9)	0.0003 (7)	0.0007 (7)	0.0045 (7)
C10	0.0263 (9)	0.0182 (9)	0.0308 (10)	−0.0024 (7)	−0.0020 (7)	0.0047 (7)
O11	0.0342 (7)	0.0309 (7)	0.0319 (7)	−0.0133 (6)	−0.0005 (6)	0.0020 (6)
C12	0.0331 (10)	0.0213 (9)	0.0233 (9)	−0.0015 (8)	−0.0005 (7)	−0.0012 (7)
C13	0.0263 (9)	0.0201 (9)	0.0254 (9)	0.0025 (7)	0.0052 (7)	0.0020 (7)
O14	0.0326 (7)	0.0272 (7)	0.0227 (6)	−0.0052 (5)	0.0049 (5)	−0.0005 (5)
C15	0.0246 (9)	0.0251 (9)	0.0256 (9)	−0.0033 (7)	0.0036 (7)	0.0024 (7)
C16	0.0254 (9)	0.0280 (10)	0.0257 (9)	−0.0002 (7)	−0.0001 (7)	0.0071 (7)
C17	0.0241 (9)	0.0220 (9)	0.0295 (9)	0.0022 (7)	0.0025 (7)	0.0050 (7)
C18	0.0211 (8)	0.0197 (9)	0.0254 (9)	−0.0023 (7)	0.0034 (7)	0.0014 (7)
C19	0.0224 (9)	0.0199 (9)	0.0264 (9)	−0.0036 (7)	0.0031 (7)	0.0003 (7)
O20	0.0300 (7)	0.0226 (6)	0.0213 (6)	−0.0055 (5)	0.0033 (5)	0.0009 (5)
C21	0.0234 (8)	0.0189 (9)	0.0228 (9)	0.0008 (7)	−0.0009 (7)	0.0025 (7)
C22	0.0224 (8)	0.0188 (9)	0.0254 (9)	0.0026 (7)	0.0010 (7)	0.0035 (7)
C23	0.0191 (8)	0.0231 (9)	0.0228 (9)	0.0004 (7)	0.0006 (7)	0.0039 (7)
C24	0.0220 (9)	0.0269 (9)	0.0266 (9)	0.0012 (7)	0.0033 (7)	0.0037 (7)
C25	0.0247 (9)	0.0247 (9)	0.0270 (9)	−0.0038 (7)	0.0030 (7)	−0.0013 (7)
C26	0.0315 (10)	0.0470 (13)	0.0264 (10)	−0.0084 (9)	0.0046 (8)	−0.0027 (9)
C27	0.0267 (9)	0.0387 (11)	0.0291 (10)	−0.0007 (8)	0.0037 (8)	0.0011 (8)
C28	0.0323 (10)	0.0303 (10)	0.0254 (9)	0.0032 (8)	0.0012 (8)	0.0040 (8)
C29	0.0416 (12)	0.0440 (13)	0.0321 (11)	0.0039 (10)	−0.0013 (9)	−0.0041 (9)
C30	0.0398 (12)	0.0566 (14)	0.0316 (11)	0.0061 (10)	0.0092 (9)	−0.0002 (10)
C31	0.0249 (9)	0.0349 (11)	0.0296 (10)	0.0009 (8)	0.0043 (7)	−0.0015 (8)
C32	0.0332 (10)	0.0350 (11)	0.0277 (10)	−0.0017 (8)	0.0076 (8)	0.0050 (8)

O1—C2	1.245 (2)	C18—C23	1.537 (2)
C2—C3	1.492 (3)	C18—H181	1.004
C2—C9	1.461 (2)	C19—O20	1.502 (2)
C3—C4	1.395 (3)	C19—C25	1.530 (2)
C3—C8	1.391 (3)	C19—C31	1.523 (2)
C4—C5	1.388 (3)	O20—C21	1.370 (2)
C4—H41	0.969	C21—C22	1.379 (2)
C5—C6	1.382 (3)	C22—C23	1.494 (2)
C5—H51	0.967	C23—C24	1.518 (2)
C6—C7	1.386 (3)	C23—H231	1.003
C6—H61	0.961	C24—H241	0.990
C7—C8	1.387 (3)	C24—H242	0.986
C7—H71	0.959	C25—C26	1.529 (2)
C8—H81	0.969	C25—H251	1.002
C9—C10	1.431 (2)	C25—H252	0.996
C9—C21	1.416 (2)	C26—C27	1.506 (3)
C10—O11	1.351 (2)	C26—H261	0.982
C10—C12	1.385 (2)	C26—H262	0.993
O11—H111	0.874	C27—C28	1.328 (3)
C12—C13	1.393 (2)	C27—H271	0.967
C12—H121	0.945	C28—C29	1.503 (3)
C13—O14	1.357 (2)	C28—C30	1.504 (3)
C13—C22	1.396 (2)	C29—H291	0.981
O14—C15	1.479 (2)	C29—H292	0.975
C15—C16	1.536 (2)	C29—H293	0.977
C15—C24	1.515 (2)	C30—H301	0.982
C15—C32	1.515 (2)	C30—H302	0.970
C16—C17	1.539 (2)	C30—H303	0.978
C16—H161	0.991	C31—H311	0.976
C16—H162	0.992	C31—H312	0.978
C17—C18	1.543 (2)	C31—H313	0.979
C17—H171	1.001	C32—H323	0.969
C17—H172	0.996	C32—H322	0.975
C18—C19	1.559 (2)	C32—H321	0.982
O1—C2—C3	116.89 (16)	O20—C19—C31	105.61 (13)
O1—C2—C9	120.99 (16)	C25—C19—C31	112.13 (14)
C3—C2—C9	122.07 (15)	C19—O20—C21	115.62 (12)
C2—C3—C4	121.53 (16)	C9—C21—O20	121.81 (15)
C2—C3—C8	118.50 (16)	C9—C21—C22	122.22 (16)
C4—C3—C8	119.73 (17)	O20—C21—C22	115.80 (15)
C3—C4—C5	119.91 (18)	C13—C22—C21	118.67 (16)
C3—C4—H41	120.2	C13—C22—C23	122.24 (15)
C5—C4—H41	119.9	C21—C22—C23	116.14 (15)
C4—C5—C6	120.00 (19)	C18—C23—C22	103.24 (13)
C4—C5—H51	119.1	C18—C23—C24	112.94 (14)
C6—C5—H51	120.9	C22—C23—C24	110.36 (14)
C5—C6—C7	120.37 (19)	C18—C23—H231	110.6
C5—C6—H61	120.2	C22—C23—H231	109.6
C7—C6—H61	119.4	C24—C23—H231	109.9
C6—C7—C8	119.9 (2)	C23—C24—C15	108.64 (14)
C6—C7—H71	120.2	C23—C24—H241	110.7
C8—C7—H71	119.9	C15—C24—H241	109.7
C3—C8—C7	120.02 (19)	C23—C24—H242	110.5
C3—C8—H81	119.9	C15—C24—H242	108.7
C7—C8—H81	120.1	H241—C24—H242	108.4
C2—C9—C10	119.22 (15)	C19—C25—C26	116.47 (15)
C2—C9—C21	124.97 (16)	C19—C25—H251	106.8
C10—C9—C21	115.68 (15)	C26—C25—H251	108.8
C9—C10—O11	120.83 (16)	C19—C25—H252	107.8
C9—C10—C12	122.15 (16)	C26—C25—H252	108.3
O11—C10—C12	116.94 (16)	H251—C25—H252	108.4
C10—O11—H111	109.2	C25—C26—C27	111.43 (16)
C10—C12—C13	119.00 (16)	C25—C26—H261	109.8
C10—C12—H121	120.7	C27—C26—H261	109.3
C13—C12—H121	120.2	C25—C26—H262	109.7
C12—C13—O14	118.03 (15)	C27—C26—H262	109.1
C12—C13—C22	120.50 (16)	H261—C26—H262	107.4
O14—C13—C22	121.31 (16)	C26—C27—C28	127.51 (18)
C13—O14—C15	117.10 (13)	C26—C27—H271	114.7
O14—C15—C16	110.88 (14)	C28—C27—H271	117.8
O14—C15—C24	109.24 (14)	C27—C28—C29	121.68 (18)
C16—C15—C24	108.97 (14)	C27—C28—C30	123.77 (18)
O14—C15—C32	103.92 (14)	C29—C28—C30	114.55 (17)
C16—C15—C32	112.01 (15)	C28—C29—H291	110.1
C24—C15—C32	111.74 (15)	C28—C29—H292	110.3
C15—C16—C17	116.82 (14)	H291—C29—H292	109.4
C15—C16—H161	109.1	C28—C29—H293	109.9
C17—C16—H161	108.3	H291—C29—H293	109.0
C15—C16—H162	105.6	H292—C29—H293	108.0
C17—C16—H162	108.1	C28—C30—H301	110.0
H161—C16—H162	108.7	C28—C30—H302	109.5
C16—C17—C18	113.52 (14)	H301—C30—H302	108.5
C16—C17—H171	109.4	C28—C30—H303	111.4
C18—C17—H171	108.8	H301—C30—H303	107.1
C16—C17—H172	108.9	H302—C30—H303	110.3
C18—C17—H172	109.1	C19—C31—H311	109.0
H171—C17—H172	106.9	C19—C31—H312	109.6
C17—C18—C19	116.21 (14)	H311—C31—H312	108.8
C17—C18—C23	108.18 (14)	C19—C31—H313	109.2
C19—C18—C23	106.99 (13)	H311—C31—H313	110.3
C17—C18—H181	108.4	H312—C31—H313	109.9
C19—C18—H181	107.7	C15—C32—H323	109.1
C23—C18—H181	109.2	C15—C32—H322	112.2
C18—C19—O20	111.90 (13)	H323—C32—H322	108.1
C18—C19—C25	108.74 (14)	C15—C32—H321	109.6
O20—C19—C25	104.37 (13)	H323—C32—H321	108.5
C18—C19—C31	113.70 (14)	H322—C32—H321	109.3

D—H···A	D—H	H···A	D···A	D—H···A
C18—H181···O1i	1.00	2.60	3.563 (3)	162
O11—H111···O1	0.87	1.78	2.551 (3)	145

Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C18—H181⋯O1i	1.00	2.60	3.563 (3)	162
O11—H111⋯O1	0.87	1.78	2.551 (3)	145

Symmetry code: (i) .