Regioselective Alkylation of Vinylogous<i>N</i>-Acyliminium Ion, Leading to 6-Alkyl-1,2,3,6-tetrahydropyridines, by Using Electrogenerated Acid (EG acid) as a Catalyst
作者:Sigeru Torii、Tsutomu Inokuchi、Sadahito Takagishi、Fumihiko Akahoshi、Kenji Uneyama
DOI:10.1246/cl.1987.639
日期:1987.4.5
Alkylation of 6-methoxy-1,2,3,6-tetrahydro- and 4-methoxy-1,2,3,4-tetrahydropyridines with organo-silicon compounds as a carbon nucleophile by using electrogenerated acid as an acid catalyst proceeds regioselectively at the C-6 position via vinylogous acyliminium ion, while sulfenylation and methoxylation occurs at the C-4 position.
以电化学生成的酸作为酸催化剂,将有机硅化合物作为碳亲核试剂对6-甲氧基-1,2,3,6-四氢吡啶和4-甲氧基-1,2,3,4-四氢吡啶进行烷基化反应,选择性地在C-6位置通过乙烯基类似酰亚胺离子进行区域选择性反应,而硫基化和甲氧基化则发生在C-4位置。