Reductive Alkylation of Tertiary Lactams via Addition of Organocopper (RCu) Reagents to Thioiminium Ions
作者:Pierre Mateo、Joséphine E. Cinqualbre、Melinda Meyer Mojzes、Kurt Schenk、Philippe Renaud
DOI:10.1021/acs.joc.7b02150
日期:2017.12.1
A simple procedure for the conversion of tertiary lactams to 2-monoalkylated cyclic amines is described. The reaction sequence involves conversion of a lactam to a thioiminium ion followed by reaction with an organocopper (RCu) reagent and final reduction with triacetoxyborohydride. The reaction is high yielding and shows an excellent functional group tolerance. Its utility is demonstrated by a rapid
描述了将叔内酰胺转化为2-单烷基化的环胺的简单程序。反应顺序包括将内酰胺转化为硫亚胺离子,然后与有机铜(RCu)试剂反应,最后用三乙酰氧基硼氢化物还原。该反应产率高并且显示出优异的官能团耐受性。吲哚并立定167B的快速合成证明了其实用性。仅形成单烷基化产物的该方法的优异化学选择性通过涉及形成瞬时烯胺的机理来合理化。