Thermal Elimination of Diethyldithiocarbamates and Application in the Synthesis of (±)-Ferrugine
作者:Shamim Ahmed、Luke A. Baker、Richard S. Grainger、Paolo Innocenti、Camilo E. Quevedo
DOI:10.1021/jo801652x
日期:2008.10.17
Dithiocarbamate-substituted lactams, prepared through group-transfer cyclization reactions of carbamoyl radicals, undergo a Chugaev-like thermal elimination of the dithiocarbamate group in refluxing diphenyl ether to form alpha,beta- and/or beta,gamma-unsaturated amides, depending on the structure of the starting material. This reaction sequence was used to prepare an unsaturated [3.2.2] bridged bicyclic
通过氨基甲酰基基团的基团转移环化反应制得的二硫代氨基甲酸酯取代的内酰胺,在回流的二苯醚中经历Chugaev式热消除二硫代氨基甲酸酯基团,形成α,β和/或β,γ-不饱和酰胺,具体取决于起始原料的结构。该反应顺序用于制备不饱和的[3.2.2]桥联双环酰胺,通过一锅法将其先转化为托烷生物碱铁的8-氮杂双环[3.2.1]辛烷环系统,然后用苯基锂处理。用氢氧化钠水溶液。