A systematic investigation of imidazo- and pyrazoloiodazinium salts is presented. Besides a robust synthetic protocol that allowed us to synthesize these novel cyclic iodonium salts in their mono- and dicationic forms, we gained in-depth structural information through single-crystal analysis and demonstrated the ring opening of the heterocycle-bridged iodonium species. For an exclusive set of dicationic
An interesting recyclization in the course of reduction of 1-(2-nitro-4-R-phenyl)-1H-benzimidazoles with tin(II) chloride
作者:Roman S. Begunov、Tatyana V. Shebunina、Yulia S. Yakovleva、Sergey I. Firgang
DOI:10.1016/j.mencom.2013.11.018
日期:2013.11
Reduction of 1-(2-nitro-4-R-phenyl)-1H-benzimidazoles with tin(H) chloride in an acidic water alcohol medium is accompanied by unusual recyclization of 1-(2-amino-4-R-phenyl)-1H-benzimidazoles formed at the first stage into isomeric 1-(2-aminopheny1)-5-R- 1H-benzimidazoles.