Pericyclic rearrangements of N-heterocyclic carbenes of indazole to substituted 9-aminoacridines
作者:Zong Guan、Sascha Wiechmann、Martin Drafz、Eike Hübner、Andreas Schmidt
DOI:10.1039/c3ob40379c
日期:——
On deprotonation, 1-arylindazolium salts form 1-arylindazol-3-ylidenes which rearrange spontaneously via ring cleavage, ring closure and subsequent proton transfer to substituted 9-aminoacridines. By contrast, the N-heterocyclic carbene of 2-phenylindazolium cannot rearrange similarly and was trapped by sulfur.
在去质子化时,1-芳基吲唑鎓盐形成1-芳基吲唑-3-亚烷基,其通过开环,闭环和随后的质子转移自发地重排至取代的9-氨基ac啶。相反,2-苯基吲唑的N-杂环卡宾不能类似地重排并且被硫捕获。