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