Light-driven selective aerobic oxidation of (iso)quinoliniums and related heterocycles
作者:Meimei Zhou、Keyang Yu、Jianxin Liu、Weimei Shi、Yingming Pan、Haitao Tang、Xiangjun Peng、Qian Liu、Hengshan Wang
DOI:10.1039/d1ra01226f
日期:——
Selective C1–H/C4–H carbonylation of N-methylene iminium salts, catalyzed by visible-light photoredox and oxygen in the air, has been reported. A ruthenium complex acts as a chemical switch to conduct two different reaction pathways and to afford two different kinds of products. In the absence of the ruthenium complex, the Csp2–H bondsadjacent to the nitrogenatoms are oxidized to α-lactams by the
Synthesis of CF3-substituted 1,2,3,4-tetrahydroisoquinolines and 1,2,3,6-tetrahydropyridines
作者:I. Yu. Chernyshov、V. V. Levin、A. D. Dilman、P. A. Belyakov、M. I. Struchkova、V. A. Tartakovsky
DOI:10.1007/s11172-010-0362-2
日期:2010.11
A three-step method for the preparation of CF3-substituted 1,2,3,4-tetrahydroisoquino-lines and 1,2,3,6-tetrahydropyridines has been suggested. The first step includes alkylation of isoquinoline or 4-methylpyridine at the nitrogen atom with the formation of salts, which are involved into the reaction with Grignard reagent or lithium triethylborohydride to give enamines. The enamines undergo nucleophilic