Studies on Lewis Acid-Mediated Intramolecular Cyclization Reactions of Allene-Ene Systems.
作者:Kunio HIROI、Takashi WATANABE、Akihiro TSUKUI
DOI:10.1248/cpb.48.405
日期:——
Lewis acid-mediated reactions of allene-ene compounds, derived from 3-methylcitronellal or dimethyl malonate, were carried out using various Lewis acids such as ethylaluminumdichloride, diethylaluminum chloride, titanium chloride, zinc chloride etherate, or boron trifluoride etherate, affording unexpectedly intramolecular [2+2]cycloaddition products under some particular reaction conditions without
Cyclizations of 3,4-pentadien-1-yllithium reagents
作者:Jack K. Crandall、Timothy A. Ayers
DOI:10.1021/jo00037a008
日期:1992.5
A number of 3,4-pentadien-1-yllithium reagents were obtained by metal-halogen exchange. Certain of these intermediates undergo facile cyclization to the isomeric 1-cyclobutenylmethyllithium derivatives.
CRANDALL, J. K.;TINDELL, G. L.;MANMADE, A., TETRAHEDRON LETT., 1982, 23, N 37, 3769-3772