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.
在环己烯酮存在的情况下,在环己烯酮存在的情况下,在胺的环加成反应中会发生环加成反应,但是在没有催化剂的情况下,通过攻击碳-碳双键而继续进行,而相比之下,在环戊烯酮的情况下,该反应会在碳-碳双键上与或发生反应。没有溴化镁。