Selective Iodine-Catalyzed Intermolecular Oxidative Amination of C(sp3)H Bonds with ortho-Carbonyl-Substituted Anilines to Give Quinazolines
作者:Yizhe Yan、Yonghui Zhang、Chengtao Feng、Zhenggen Zha、Zhiyong Wang
DOI:10.1002/anie.201203880
日期:2012.8.6
The selectiveamination of C(sp3)Hbonds adjacent to nitrogen or oxygen atoms of N‐alkylamides, ethers, or alcohols with ortho‐carbonyl‐substituted anilines constitutes the first step in a tandem annulation that leads to quinazolines in good to excellent yields (see scheme; NIS=N‐Iodosuccinimide, TBHP=tert‐butyl hydroperoxide). The selectivity of the amination of primary and secondary CHbonds is
Visible-light photocatalyzed C–N bond activation of tertiary amines: a three-component approach to synthesize quinazolines
作者:Ajithkumar Arumugam、Gopal Chandru Senadi
DOI:10.1039/d3ob02067c
日期:——
three-component approach has been developed to prepare 2,4-disubstituted quinazolines from o-acylanilines, trialkylamines and ammonium chloride under visible-light using eosin Y as the photocatalyst. The notable features of this work include (i) the use of tertiaryamines as an alkyl synthon and triethanolamine as a C2-OH synthon; (ii) good functional group tolerance with 52%–98% yields; (iii) proof of
开发了一种无金属三组分方法,以曙红 Y 作为光催化剂,在可见光下由邻酰基苯胺、三烷基胺和氯化铵制备 2,4-二取代喹唑啉。这项工作的显着特点包括(i)使用叔胺作为烷基合成子和三乙醇胺作为C 2 -OH合成子; (ii) 良好的官能团耐受性,产率 52%–98%; (iii) 以邻氨基苯甲醛为底物传递 2-甲基喹唑啉3pa的概念验证; (iv)化合物3ga 、 3ja和3ma的克级合成。基于控制研究和氧化还原电位值,提出了还原猝灭机制。