Reactivity of 6 alpha,7 alpha-epoxyhimachal-2-ene and crystal structures of 2 alpha,3 alpha-dibromocyclopropanehimachal-5,7-diene and 2 alpha,3 alpha-dibromocyclopropane-6 alpha,7 alpha-epoxyhimachalane

Authors
Auhmani, A Kossareva, E El Jamili, H Reglier, M Pierrot, M Benharref, A
Citation
A. Auhmani et al., Reactivity of 6 alpha,7 alpha-epoxyhimachal-2-ene and crystal structures of 2 alpha,3 alpha-dibromocyclopropanehimachal-5,7-diene and 2 alpha,3 alpha-dibromocyclopropane-6 alpha,7 alpha-epoxyhimachalane, J CHEM CRYS, 30(8), 2000, pp. 525-530
Citations number
15
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF CHEMICAL CRYSTALLOGRAPHY
ISSN journal
10741542 → ACNP
Volume
30
Issue
8
Year of publication
2000
Pages
525 - 530
Database
ISI
SICI code
1074-1542(200008)30:8<525:RO6AAA>2.0.ZU;2-B
Abstract
We report here the reactivity of 6 alpha ,7 alpha -epoxyhimachal-2-ene with dibromocarbene generated in situ by phase-transfer catalysis. The stereoch emistry of products resulting from dibromocyclopropanation has been establi shed by X-ray crystallography. Compound 3 is orthorhombic P2(1)2(1)2(1) wit h a = 7.549 (1), b = 8.432 (1). c = 24.469 (1) Angstrom, V = 1559.8 (5) Ang strom (3), Z = 4 and compound 5 is monoclinic P2(1) with a = 8.779 (1), b = 15.684 (1), c = 12.111 (1) Angstrom, beta = 91.869 (1)degrees, V = 1666.7 (4) Angstrom (3) and Z = 4.