DENMARK, SCOTT E.;HITE, GARY A., HELV. CHIM. ACTA, 71,(1988) N, 195-208
作者:DENMARK, SCOTT E.、HITE, GARY A.
DOI:——
日期:——
Silicon-DirectedNazarov Cyclizations. Part VI. The anomalous cyclization of vinyl dienyl ketones
作者:Scott E. Denmark、Gary A. Hite
DOI:10.1002/hlca.19880710121
日期:1988.2.3
double bond. Aryl dienyl and alkyl dienyl ketones (see 1f–h) do not cyclize cleanly. The effects of substituents on the rate of reaction is discussed in terms of the mechanism of the rearrangement. A 13C-labeling study establishes the pathway as an unusual 1-hydroxypentadienyl-cation electrocyclization to a cyclopentenyl cation which collapses via a pinacolrearrangement to the α-vinyl ketone.