Copper-Catalyzed Cross-Dehydrogenative-Coupling Reaction of N-Arylglycine Esters with Imides or Amides for Synthesis of α-Substituted α-Amino Acid Esters
作者:Zhi-Qiang Zhu、Zong-Bo Xie、Zhang-Gao Le、Li-Jin Xiao、Dong Guo、Yue Lu
DOI:10.1055/s-0036-1591586
日期:2018.7
highly efficient cross-dehydrogenative-coupling (CDC) reaction between N-aryl glycine esters and imides or amides by the catalysis of a copper salt without the requirement of peroxide agents is described. The novel reaction provides a facile approach for the synthesis of α-substituted α-amino acid estersthrough C–H/N–H oxidative cross-coupling. A possible mechanism for the CDC reaction by using copper
Cross-Dehydrogenative Coupling Reactions by Transition-Metal and Aminocatalysis for the Synthesis of Amino Acid Derivatives
作者:Jin Xie、Zhi-Zhen Huang
DOI:10.1002/anie.201004940
日期:2010.12.27
The direct approach: The title couplingreactions of N‐aryl glycine esters with unmodified ketones occurred smoothly in the presence of tert‐butyl hydroperoxide (TBHP) or 2,3‐dichloro‐5,6‐dicyano‐1,4‐benzoquinone (DDQ) under mild conditions (see scheme). The oxidant used for CH activation determined the selectivity of the reactions for a particular type of ketone substrate.
Copper-Catalyzed Oxidative [4 + 2]-Cyclization Reaction of Glycine Esters with Anthranils: Access to 3,4-Dihydroquinazolines
作者:Jie Ren、Chao Pi、Yangjie Wu、Xiuling Cui
DOI:10.1021/acs.orglett.9b01246
日期:2019.6.7
synthesis of 3,4-dihydroquinazolines has been developed via copper-catalyzed oxidative cross-dehydrogenative [4 + 2]-cyclization of glycine derivatives with anthranils. This strategy features high efficiency and wide substrate tolerance under simple reaction conditions. Various 3,4-dihydroquinazoline derivatives could be easily obtained starting from titled products through chemical transformations, which