Proline-catalyzed facile access to Mannich adducts using unsubstituted azoles
摘要:
A novel and facile method for the direct construction of C-C-N bond with unsubstituted azoles under Mannich conditions is developed for the first time. The reaction is catalyzed efficiently by.-proline to give the Mannich adducts 1a-10b in DMSO, whereas in water, insertion of two successive bonds, C-C-N and C-C-O occurred to give compounds 11a-20b. The latter are deformylated readily into the desired products 1a-10b Under basic conditions. Mechanistic aspects for the formation of these products are discussed. (c) 2008 Elsevier Ltd. All rights reserved.
Proline-catalyzed facile access to Mannich adducts using unsubstituted azoles
作者:Nagarapu Srinivas、Kalpana Bhandari
DOI:10.1016/j.tetlet.2008.09.155
日期:2008.12
A novel and facile method for the direct construction of C-C-N bond with unsubstituted azoles under Mannich conditions is developed for the first time. The reaction is catalyzed efficiently by.-proline to give the Mannich adducts 1a-10b in DMSO, whereas in water, insertion of two successive bonds, C-C-N and C-C-O occurred to give compounds 11a-20b. The latter are deformylated readily into the desired products 1a-10b Under basic conditions. Mechanistic aspects for the formation of these products are discussed. (c) 2008 Elsevier Ltd. All rights reserved.