and 5-nitro derivatives underwent smooth reaction with a variety of acyclic and cyclic active methylene compounds on neutral alumina at rt to efficiently furnish Knoevenagel condensates in the majority of the cases and tandem Knoevenagel condensation-Michael addition products including spiro compounds in two cases.
在大多数情况下,
靛红及其 N-甲基和 5-硝基衍
生物在中性氧化铝上与多种无环和环状活性亚甲基化合物顺利反应,在大多数情况下有效地提供 Knoevenagel 缩合物和串联的 Knoevenagel 缩合-迈克尔加成产物,包括螺环两种情况下的复合。