CLARKE, CAROL;FLEMING, IAN;FORTUNAK, JOSEPH M. D.;GALLAGHER, PETER T.;HON+, TETRAHEDRON, 44,(1988) N 13, 3931-3944
作者:CLARKE, CAROL、FLEMING, IAN、FORTUNAK, JOSEPH M. D.、GALLAGHER, PETER T.、HON+
DOI:——
日期:——
An approach to the synthesis of gelsemine: the intramolecular reaction of an allylsilane with an acyliminium ion for the synthesis of one of the quaternary centres
作者:Carol Clarke、Ian Fleming、Joseph M.D. Fortunak、Peter T. Gallagher、Matthew C. Honan、André Mann、Christoph O. Nübling、Paul R. Raithby、J.Jens Wolff
DOI:10.1016/s0040-4020(01)86646-1
日期:1988.1
steps in the synthesis are (i) the Diels-Alder reactionbetween 1-tetrahydropyranyloxycyclohexa-1,3-diene (10) and methyl β-nitroacrylate (11) giving an adduct (12), in which the chiral centre in the tetrahydropyranyl ring is produced substantially in only one sense, (ii) the rearrangement of a bicyclo [2.2.2] octane (23) into a bicyclo[ 3.2.1] octane (24), where control of which bridge migrates is