visible-light-induced aerobic oxidative [2 + 3] cycloaddition reaction between glycine derivatives and styreneoxides has been disclosed that provides an efficient approach for the rapid synthesis of 1,3-oxazolidines under mild conditions. This photoinduced process is enabled by the formation of an electron donor-acceptor complex between glycine derivatives and benzyl iodides.
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
peroxide (DTBP)-promoted α-alkylation of α-amino carbonyl compounds by simple alkanes is developed, proceedingthrough dual sp3 C–H bonds cleavage. The reaction was applicable for α-amino ketones and α-amino esters, providing a facile pathway for the α-functionalization of these substrates. The radical pathway is involved in this transformation.
Auto-oxidation promoted sp<sup>3</sup> C–H arylation of glycine derivatives
作者:Yuanyuan Wei、Jie Wang、Yajun Wang、Xiaoqiang Yao、Caixia Yang、Congde Huo
DOI:10.1039/c8ob01068d
日期:——
An auto-oxidation promoted sp3 C–H arylation reaction between N-aryl glycine derivatives and electron-rich arenes, leading to the formation of N-aryl α-aryl α-amino acid derivatives, is described. This atom-economical and environmentally benign reaction proceeds smoothly under mild reaction conditions and requires only Brønstedacid and oxygen (balloon). A plausible radical involved mechanism is proposed
Unnatural α-Amino Acid Synthesized through α-Alkylation of Glycine Derivatives by Diacyl Peroxides
作者:Hao Tian、Wentao Xu、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.orglett.0c01574
日期:2020.7.2
We have developed a protocol for catalyst- and additive-free α-alkylationreactions of glycine derivatives with diacyl peroxides, which proceed by a pathway involving addition of alkyl radicals to imine intermediates. The diacyl peroxide substrate acts as both alkylation agent and oxidizing agent, which means it is atom-economical. It was applied to various glycine derivatives, dipeptides, and a 3