Functionalized hydrocarbons with condensed ring skeletons. X. A methyltricyclo[7.4.0.0(2,6)]tetradec-7-ene.
(1) 1,9-trans-1,2-cisoid-2,6-cis-4,11,11-Tris(methoxycarbonyl)-6- methyltricyclo[7.4.0.0(2,6)]-tridec-7-ene-4,2-carbolacton e+ ++, C21H26O8, Mr = 406.43, monoclinic, P1, a = 6.0774 (2), b = 12.3784 (5), c = 14.2565 (4) A, alpha = 72.906 (3), beta = 86.361 (3), gamma = 78.181 (3) degrees, V = 1003.38 (6) A3, Dx = 1.345 Mg m-3, Z = 2, lambda (Cu K alpha) = 1.54056 A, mu = 0.82 mm-1, F(000) = 432, room temperature, final R = 0.043 for 2841 observed reflections. The tricyclic compound (1) has the same carbon framework as in the BCD rings in a steroid nucleus. Ring B adopts a chair while ring C has a half-chair conformation. A trans relative stereochemistry is observed at the BC ring junction while a cis hydrinclane is observed for the CD junction, the lactone bridge being cis to the angular methyl group at C(6) and to the hydrogen at C(1).
Drouin
M
M
Laboratoire de chimie structurale et de modélisation moléculaire and Laboratoire de chimie organique, Université de Sherbrooke, Québec, Canada.
Soucy
P
P
Deslongchamps
P
P
Michel
A G
AG
D001952:Bridged-Ring Compounds / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D015394:Molecular Structure; D014961:X-Ray Diffraction / Q000379:methods
D001952:Bridged-Ring Compounds; C068437:4,11,11-tris(methoxycarbonyl)-6-methyltricyclo(7.4.0.0)tridec-7-ene-4,2-carbolactone