NNN pincer Ru(II)-catalyzed dehydrogenative coupling of 2-aminoarylmethanols with nitriles for the construction of quinazolines
作者:Xiao-Min Wan、Zi-Lin Liu、Wan-Qing Liu、Xiao-Niu Cao、Xinju Zhu、Xue-Mei Zhao、Bing Song、Xin-Qi Hao、Guoji Liu
DOI:10.1016/j.tet.2019.03.046
日期:2019.5
Ru(II)-catalyzed preparation of quinazolines via acceptorless dehydrogenative strategy has been developed. Under the optimized conditions, a broad range of substituted o-aminobenzyl alcohols and (hetero)aryl or alkyl nitriles were well tolerated to afford various 2-substituted quinazolines in high yields. Subsequently, a set of control experiments have been performed to elucidate the reaction mechanism,
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