α-Bromo-β,γ-unsaturated ketenes for the synthesis of α-benzylamino-β,γ-unsaturated acids
作者:Giuliana Cardillo、Serena Fabbroni、Luca Gentilucci、Rossana Perciaccante、Alessandra Tolomelli
DOI:10.1016/j.tetasy.2003.12.029
日期:2004.2
The synthesis of α-benzylamino-β,γ-unsaturated acids has been developed starting from α-bromo-α,β-unsaturated chlorides. Via treatment of the acyl chlorides with (R)-pantolactone in the presence of TEA, the in situ formation of the deconjugated ketenes and their direct transformation into chiral esters was performed. The substitution of bromine with benzylamine, followed by acid hydrolysis, allowed
从α-
溴-α,β-不饱和
氯化物开始发展了α-苄
氨基-β,γ-不饱和酸的合成。通过在
TEA存在下用(R)-泛内酯处理酰
氯,原位形成解偶联的烯酮并将其直接转化为手性酯。用
苄胺取代
溴,然后进行酸
水解,可以得到对映异构体富集的α-苄
氨基-β,γ-不饱和酸。