acids having an α electron-withdrawing substituent in the presence of TFAA and a Lewis acid catalyst resulted in the formation of fused cyclopentenones via a tandem acylation–Nazarov cyclization sequence, while either the acylation product obtained or no reaction occurred in the absence of the Lewis acid catalyst.
在
TFAA和Lewis酸催化剂存在下,用具有α吸电子取代基的α-未取代的α,β-不饱和
羧酸或不饱和
羧酸处理N-
甲苯磺酰基
吡咯或N-甲
苯磺酸,导致稠合的
环戊烯酮通过串联酰化反应-Nazarov环化顺序,而在没有
路易斯酸催化剂的情况下获得的酰化产物或没有反应发生。