An I<sub>2</sub>-mediated aerobic oxidative annulation of amidines with tertiary amines<i>via</i>C–H amination/C–N cleavage for the synthesis of 2,4-disubstituted 1,3,5-triazines
作者:Yizhe Yan、Zheng Li、Chang Cui、Hongyi Li、Miaomiao Shi、Yanqi Liu
DOI:10.1039/c8ob00635k
日期:——
An iodine-mediated formal oxidative cycloaddition of amidines with tertiary amines was first demonstrated in air. Both symmetrical and unsymmetrical 2,4-disubstituted 1,3,5-triazines were obtained in up to 85% yields. It is noted that a tertiary amine was employed as a one carbon synthon of 1,3,5-triazines and two C–N bonds were formed in one pot. Control experiments revealed that the reaction underwent
Transition metal-free C–F/C–Cl/C–C cleavage of ClCF<sub>2</sub>COONa for the synthesis of heterocycles
作者:Yizhe Yan、Chang Cui、Jianyong Wang、Shaoqing Li、Lin Tang、Yanqi Liu
DOI:10.1039/c9ob01641d
日期:——
ClCF2COONa was employed as a C1 synthon for 1,3,5-triazines or quinazolinones in up to 96% yields under transition metal-free and external oxidant-free conditions.
A Novel Straightforward Synthesis of 2,4-Disubstituted-1,3,5-triazines via Aerobic Copper-Catalyzed Cyclization of Amidines with DMF
作者:Xiaowen Xu、Min Zhang、Huanfeng Jiang、Jia Zheng、Yiqun Li
DOI:10.1021/ol501493h
日期:2014.7.3
A novel straightforward synthesis of both symmetrical and unsymmetrical 2,4-disubstituted-1,3,5-triazines via aerobiccopper-catalyzedcyclization of amidines with DMF as a one-carbon synthon has been developed. The presented method allows synthesizing the products that are currently inaccessible or challenging to prepare with the advantages of operational simplicity, broad substrate scope, and no
New Strategy for the Synthesis of Heterocycles via Copper-Catalyzed Oxidative Decarboxylative Amination of Glyoxylic Acid
作者:Bin Niu、Shaoqing Li、Chang Cui、Yizhe Yan、Lin Tang、Jianyong Wang
DOI:10.1002/ejoc.201901538
日期:2019.12.31
A copper‐catalyzed oxidative decarboxylative amination of glyoxylic acid with substrates having two nitrogen‐nucleophilic sites was first demonstrated, affording 1,3,5‐triazines, quinazolinones and quinazolines in up to 93 % yields.
Alkyl Ether as a One-Carbon Synthon: Route to 2,4-Disubstituted 1,3,5-Triazines via C–H Amination/C–O Cleavage under Transition-Metal-Free Conditions
作者:Yizhe Yan、Zheng Li、Hongyi Li、Chang Cui、Miaomiao Shi、Yanqi Liu
DOI:10.1021/acs.orglett.7b03171
日期:2017.11.17
A transition-metal-free oxidativeformal [3 + 2 + 1] cycloaddition for the synthesis of symmetrical and unsymmetrical 2,4-disubstituted 1,3,5-triazines has been first demonstrated. The reaction is involved in a domino C–H amination of alkyl ethers with amidines, C–O cleavage, nucleophilic addition, condensation, and an oxidative aromatization process. Notably, two C–N bonds were constructed in one