N-Heterocyclic Carbenes of Indazole as Reagents: Indazol-3-ylidene-Mediated Syntheses of Amidines from Thiolactams of Pyrrolobenzodiazepines
作者:Andreas Schmidt、Anika Lindner
DOI:10.1055/s-0028-1083626
日期:2008.12
On decarboxylation, 1,2-dimethylindazolium-3-carboxylate forms in situ the N-heterocyclic carbene 1,2-dimethylindazol-3-ylidene, which proved to be a suitable reagent for amidinations of the monothiolactam of benzo[e]pyrrolo[1,2-a][1,4]diazepine. A comparison of this metal-free approach to amidines to HgCl2- and Bi(NO3)3-mediated reactions is presented.
在脱羧反应中,1,2-二甲基吲唑鎓-3-羧酸盐原位生成N-杂环卡宾1,2-二甲基吲唑-3-亚烯,这被证明是对苯并[e]吡咯并[1,2-a][1,4]二氮杂烯的单硫内酰胺进行胺化的合适试剂。文中还对这种无金属方法与HgCl2和Bi(NO3)3介导反应的胺化进行了比较。