Reactions de cyclobutenes electrophiles avec les enamines
作者:M. Franck-Neumann、M. Miesch、F. Barth
DOI:10.1016/s0040-4020(01)85833-6
日期:1988.1
with different ketoneenamines, in the presence of magnesium bromide, 1-methoxycarbonyl- and 1-cyano-cyclobutene lead to α-cyclobutyl ketones or to amino-bicyclo [2.2.0] hexane adducts. These products are not formed competitively, but apparently result from different reactions. The cyclobutene nitrile undergoes an exclusive cycloaddition reaction with morpholino enamines. All other reagent combinations