Iron-catalyzed cascade reaction of 2-aminobenzyl alcohols with benzylamines: synthesis of quinazolines by trapping of ammonia
作者:Kovuru Gopalaiah、Anupama Saini、Alka Devi
DOI:10.1039/c7ob01159h
日期:——
A novel approach to construct 2-aryl/heteroaryl quinazolines was developed through iron-catalyzed cascade reaction of 2-aminobenzyl alcohols with benzylamines under aerobic oxidative conditions. The reaction proceeds via the formation of N-benzylidenebenzylamines followed by oxidative trapping of ammonia/intramolecular cyclization in a one-pot manner. The method exhibits a broad substrate scope, high
The first example of a copper-catalyzedcascade reaction of (2-aminophenyl)methanols with aldehydes using the combination of cerium nitrate hexahydrate and ammonium chloride has been developed, leading to a wide range of 2-substituted quinazolines in moderate to excellent yields. The efficiency of this transformation was demonstrated by compatibility with a wide range of functional groups. Thus, the
BTP‐Rh@g‐C
<sub>3</sub>
N
<sub>4</sub>
as an efficient recyclable catalyst for dehydrogenation and borrowing hydrogen reactions
作者:Lan Luo、Hongqiang Liu、Wei Zeng、Wenkang Hu、Dawei Wang
DOI:10.1002/aoc.6504
日期:2022.2
Highly active catalysts play an important role in modern catalysis. A novel and efficient ligand benzotriazole-pyrimidine (BTP) and the corresponding rhodium composite on C3N4 were successfully synthesized. The resulting rhodium composite was fully characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), x-ray diffraction (XRD), thermogravimetric analysis (TGA),
高活性催化剂在现代催化中发挥着重要作用。C 3 N 4上新型高效配体苯并三唑-嘧啶 (BTP) 和相应的铑复合物合成成功。得到的铑复合材料通过扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、X 射线衍射 (XRD)、热重分析 (TGA) 和 X 射线光电子能谱 (XPS) 进行了全面表征。所得复合物在2-氨基苄醇和苄腈合成喹喔啉中表现出良好的催化活性和良好的回收性能,以良好收率得到20多种喹喔啉。此外,还表明,通过借氢策略,铑复合材料在功能化酮的合成中具有良好的催化性能。