Niacin as a Potent Organocatalyst towards the Synthesis of Quinazolines Using Nitriles as C-N Source
作者:Raghuram Gujjarappa、Nagaraju Vodnala、Velma Ganga Reddy、Chandi C. Malakar
DOI:10.1002/ejoc.201901651
日期:2020.2.21
An organocatalyzed protocol has been described for the comprehensive synthesis of 2‐substituted quinazolines usingnitriles as C–N source. The developed reaction conditions are suitable for a wide range of substrates providing the desired products in excellent yields.
Divergent Synthesis of Quinazolines Using Organocatalytic Domino Strategies under Aerobic Conditions
作者:Raghuram Gujjarappa、Suvik K. Maity、Chinmoy K. Hazra、Nagaraju Vodnala、Shiv Dhiman、Anil Kumar、Uwe Beifuss、Chandi C. Malakar
DOI:10.1002/ejoc.201800746
日期:2018.9.9
A convenient approach to the synthesis of 2‐substituted quinazolines is described based on an organocatalyticdomino reaction. Under the developed conditions, a wide range of substrates was explored, and the desired products were obtained in high yields.
Synthesis of Quinazolines and Tetrahydroquinazolines: Copper-Catalyzed Tandem Reactions of 2-Bromobenzyl Bromides with Aldehydes and Aqueous Ammonia or Amines
An efficient synthesis of diversely substituted quinazolines and 1,2,3,4‐tetrahydroquinazolines through copper‐catalyzed tandem reactions of the readily available 2‐bromobenzyl bromides, aldehydes, and aqueousammonia or amines has been developed. By using ammonia and simple aliphatic amines as the nitrogen source, the present method provides a versatile and practical protocol for the synthesis of
Iridium supported on porous polypyridine-oxadiazole as high-activity and recyclable catalyst for the borrowing hydrogen reaction
作者:Jiahao Li、Anruo Mao、Wei Yao、Haiyan Zhu、Dawei Wang
DOI:10.1039/d2gc00190j
日期:——
HRTEM, SEM, and XPS, and revealed high catalytic activity for the reaction of dimethyl-6-aminouracil with benzylalcohols, 1,3-dimethylbarbituric acid with benzylalcohols and 2-aminobenzylamine and benzylalcohols through dehydrogenation and the borrowinghydrogenstrategy with alcohol or water as the solvent. In addition, this PPO-Ir catalyst could be recycled and reused without a manifest loss of