Chlorination of Acyclic β-Diketones. Formation and Stability of β-Chloro-β,γ-unsaturated Ketones
作者:Toshio Sugita、Hiroshi Ito、Akihiko Nakajima、Motoshi Sunami、Atsushi Kawakatsu、Masakazu Suama、Katsuhiko Ichikawa
DOI:10.1246/bcsj.60.721
日期:1987.2
tetrachloride and the other chlorinating reagents predominantly afforded β-chloro-β,γ-unsaturated ketones except the cases of the terminal alkyl group of the diketones was methyl or t-butyl. In these reactions, the isomerization of the β-chloro-α,β-unsaturated ketones to the β,γ-unsaturated isomers was involved; the isomerization was achieved by triphenylphosphine–carbon tetrachloride as well as by
用
三苯基膦-
四氯化碳和其他
氯化试剂
氯化无环
β-二酮主要得到β-
氯-β,γ-不饱和
酮,但二
酮末端烷基为
甲基或叔丁基的情况除外。在这些反应中,涉及β-
氯-α,β-不饱和
酮异构化为β,γ-不饱和异构体;异构化是通过
三苯基膦-
四氯化碳以及一些酸
催化剂实现的。