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.
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