Cyclopentenone and cyclohexenone annulations via acid-catalyzed 1,2- and 1,3-acyl migration of 2-vinylcyclobutanones. Rearrangement route to spiro- and angularly substituted fused-cyclopentenones.
作者:James R. Matz、Theodore Cohen
DOI:10.1016/s0040-4039(01)92932-6
日期:1981.1
In the presence of acid, 2-alkyl-2-vinylcyclobutanones rearrange mainly by a 1,2-acyl migration to give cyclopentenones while 2-vinylcyclobutanones lacking 2-alkyl substituents undergo a 1,3-acyl migration to produce cyclohexenones; the former rearrangement can be used to produce angularlysubstituted fused bicyclic systems.
A synthesis of 2-vinylcylobutanones using 1-methoxycyclopropyllithium reagents
作者:Theodore Cohen、James R. Matz
DOI:10.1016/s0040-4039(01)92931-4
日期:1981.1
GADWOOD, R. C.;RUBINO, M. R.;NAGARAJAN, SRIDHAR, C.;MICHEL, S. T., J. ORG. CHEM., 1985, 50, N 18, 3255-3260
作者:GADWOOD, R. C.、RUBINO, M. R.、NAGARAJAN, SRIDHAR, C.、MICHEL, S. T.
DOI:——
日期:——
GADWOOD, R. C., TETRAHEDRON LETT., 1984, 25, N 51, 5851-5854
作者:GADWOOD, R. C.
DOI:——
日期:——
1-bromo-1-ethoxycyclopropane: a new reagent for cyclobutanone synthesis
作者:Robert C. Gadwood
DOI:10.1016/s0040-4039(01)81702-0
日期:1984.1
A variety of of cyclobutanones have been prepared in high yield from 1-bromo-1-ethoxycyclopropane via lithiation, addition to aldehydes or ketones, and mild acid-catalyzedrearrangement of the adducts.