An unprecedented Ru-catalyzed directasymmetric reductive amination of α-keto amides with ammonium salts has been achieved. This protocol provides an efficient and practical way for the synthesis of diverse enantioenriched α-aryl- or alkyl-substituted N-unprotected unnatural α-amino acids and N-unprotected β-branched α-amino acids. Further follow-up transformations enable access to drug intermediates
TBAI-catalyzed synthesis of α-ketoamides via sp3 C–H radical/radical cross-coupling and domino aerobic oxidation
作者:Weizheng Fan、Dongyang Shi、Bainian Feng
DOI:10.1016/j.tetlet.2015.06.021
日期:2015.7
A TBAI-catalyzed one-pot synthesis of cx-ketoamides via sp(3) C-H radical/radical cross-coupling and domino aerobic oxidation was developed. This synthesis is suitable for abroad range of substrates. The control experiments suggested a possible oxidative coupling mechanism. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis of 2-hydroxymalonamides from Carbamoylsilane and A-keto Carboxamides
作者:Xiao Juan Chen、Jian Xin Chen
DOI:10.1016/j.mencom.2013.03.019
日期:2013.3
Reaction between N,N-dimethylcarbamoylsilane and N,N-dimethyl-alpha-keto carboxamides affords 2-hydroxy-N,N,N',N'-tetramethyl-2-R-malonamides in good yields.