Regiospecific Synthesis of α-Diones, α,α-Dialkoxyketones and α-Alkoxy-α-sulfenylated Ketones
作者:Kourosch Abbaspour Tehrani、Marc Boeykens、Vladimir I. Tyvorskii、Oleg Kulinkovich、Norbert De Kimpe
DOI:10.1016/s0040-4020(00)00604-9
日期:2000.8
A convenient synthesis of α-diones and their monoprotected acetals, i.e. α-ketoacetals, was developed by mercury induced solvolysis of regiospecifically formed α-chloro-α-(alkylthio)ketones. Analogously, α-alkoxy-α-sulfenylated ketones were formed when reacting α-chloro-α-sulfenylated ketones with an alkaline alcoholic medium. α-Alkoxy-α-sulfenylated ketones themselves could be transformed into α-diones
通过汞诱导的区域特异性形成的α-氯代-α-(烷硫基)酮的溶剂化反应,开发了一种方便的合成α-二酮及其单保护缩醛,即α-酮缩醛的方法。类似地,当α-氯-α-亚磺酰基化的酮与碱性醇介质反应时,形成α-烷氧基-α-亚磺酰基化的酮。α-烷氧基-α-亚磺酰化的酮本身可以转化为α-二酮或α-酮缩醛,然后在无水条件下将其水解为相应的α-二酮。