Synthesis of 2-alkyl-2-arylcyanoacetates via CuI/sodium picolinate-catalyzed direct arylation of α-substituted cyanoacetates
摘要:
CuI/sodium picolinate-catalyzed direct arylation of alpha-substituted cyanoacetates takes place at 60 degrees C in the presence of Cs2CO3 and 4 angstrom molecular sieve, affording 2-alkyl-2-arylcyanoacetates in good to excellent yields. Both electron-rich and electronic-deficient aryl iodides, and some functionalized a-substituted cyanoacetates are compatible with the reaction conditions, thereby allowing diverse synthesis of 2-alkyl-2-arylcyanoacetates. (C) 2013 Elsevier Ltd. All rights reserved.
Palladium-Catalyzed One-Pot Synthesis of 2-Alkyl-2-arylcyanoacetates
作者:Xiang Wang、Anil Guram、Emilio Bunel、Guo-Qiang Cao、Jennifer R. Allen、Margaret M. Faul
DOI:10.1021/jo7024338
日期:2008.2.1
[GRAPHICS]A one-pot procedure for the synthesis of 2-alkyl-2-arylcyanoacetates based on a Pd(OAc)(2)/DPPF (DPPF = 1,1'-diphenylphosphino ferreocene)-catalyzed enolate arylation followed by in situ alkylation has been developed. This procedure tolerates a diverse range of aryl and heteroaryl bromides, and provides a rapid entry to a variety of 2-alkyl-2-arylcyanoacetates in good to excellent yield.