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
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
A visible-light-promoted cross-dehydrogenative-coupling reaction of N -arylglycine esters with imidazo[1,2- a ]pyridines
作者:Zhi-Qiang Zhu、Li-Jin Xiao、Chun-Cheng Zhou、Han-Lin Song、Zong-Bo Xie、Zhang-Gao Le
DOI:10.1016/j.tetlet.2018.07.047
日期:2018.8
cross-dehydrogenative-coupling reaction between N-arylglycine esters and imidazo[1,2-a]pyridines for the construction of CC bond was developed. A range of N-arylglycine esters and imidazo[1,2-a]pyridines were able to undergo the CDC reaction readily to afford α-heteroaryl substituted α-amino acid derivatives in good to excellent yields. A tentative mechanism for the photoredox reaction was also proposed. Importantly
N-芳基甘氨酸酯与咪唑并[1,2- a ]吡啶之间温和方便的可见光促进的交叉脱氢偶联反应被用于构建C C键。一系列的N-芳基甘氨酸酯和咪唑并[1,2- a ]吡啶能够很容易地进行CDC反应,从而以良好或优异的收率得到α-杂芳基取代的α-氨基酸衍生物。还提出了光氧化还原反应的初步机制。重要的是,在这种可见光促进的转化中使用铜(II)盐作为唯一催化剂使该反应可持续且实用。