B. Patro et al., REARRANGEMENT STUDIES ON BIS(METHYLTHIO)-1-(ARYLCYCLOPROPYL)-2-PROPEN-1-OLS - SYNTHESIS OF FUNCTIONALIZED CYCLOPENTENES AND POLYENE ESTERS, Tetrahedron, 50(1), 1994, pp. 255-264
The cyclopropyl carbinols 8 and 9 obtained by either borohydride reduc
tion (or Grignard addition) of the cyclopropyl ketones 1 are shown to
undergo acid induced ring opening and intramolecular cyclization (5-ex
o or 6-endo) or deprotonation to afford either cyclopentene, biphenyl
or conjugated polyene derivatives depending on the nature of Lewis aci
d, reaction conditions and the structural features present in the cycl
opropyl carbinol. A probable mechanism for the formation of various pr
oducts has been suggested.