An enantioselective vinylogous umpolung addition of deconjugated butenolides to allenoates has been developed for the first time with the help of synergistic combination of an achiral phosphine and a chiral squaramide, and represents the first example of a catalytic enantioselective Cγ–Cγ bond formation between two different carbonyl partners.
在无手性膦和手性方
酰胺协同作用的帮助下,首次开发出了将
脱共轭
丁烯内
酯与异
烯酸
酯进行对映选择性
乙烯基仲醇加成的方法,这也是在两个不同的羰基伙伴之间催化对映选择性 Cγ-Cγ 键形成的首个实例。