under a CO2 atmosphere, various tertiary and secondary propargyl alcohols were efficiently converted into the corresponding α,β-unsaturated carbonyl compounds in high yield. An isotopic experiment using C18O2 revealed that carbon dioxide mediated the rearrangement via an intramolecular nucleophilic attack on the alkyne activated by the silver catalyst.
在
CO2 气氛下,在催化量的
银盐与
DBU 的存在下,各种炔
丙醇叔醇和仲炔醇有效地转化为相应的 α,β-不饱和羰基化合物,收率很高。使用 C18O2 的同位素实验表明,
二氧化碳通过对
银催化剂活化的
炔烃的分子内亲核攻击来介导重排。