Influence of magnesium bromide on the regioselectivity of the cycloaddition of ynamines with cyclenones: difference in reactivity between cyclohexenones and cyclopentenones.
作者:J. Ficini、A. Krief、A. Guingant、D. Desmaele
DOI:10.1016/0040-4039(81)80134-7
日期:1981.1
The cycloaddition of ynamines uith cyclohexenones occurs in the presence of magnesium bromide at the carbonyl but proceeds by attack on the carbon—carbon double bond without catalyst whereas, in contrast, with cyclopentenones, the reaction takes place at the carbon—carbon double bond with or without magnesium bromide.