Reaction of benzo[c]cinnolinium-5-(N-acyl- and N-benzimido-imides) with diphenylcyclopropenone
作者:John J. Barr、Richard C. Storr、Vishnu K. Tandon
DOI:10.1039/p19800001147
日期:——
Benzo[c]cinnolinium-5-(N-acylimides)(6; R = Ph, OEt, or Me) give benzo[c]cinnoline and 2-substituted-4,5-diphenyloxazin-6-ones (7) on reaction with diphenylcyclopropenone. In contrast, the related benzo[c]cinnolinium-5-(N-benzimidoimides)(11; R = H, Ph, or p-tolyl) give stable adducts (12), which on pyrolysis yield benzo[c] cinnoline and 1-substituted-2,5,6-triphenylpyrimidin-4-ones.
苯并[ c ] cinolinolin -5-(N-酰基酰亚胺)(6; R = Ph,OEt或Me)反应生成苯并[ c ] cinnoline和2-取代的4,5-二苯基恶嗪-6-一(7)与二苯基环丙烯酮。相反,相关的苯并[ c ]肉桂鎓-5-(N-苯甲酰亚胺亚胺)(11; R = H,Ph或对甲苯基)生成稳定的加合物(12),经热解后可生成苯并[c] cinnoline和1 -取代的2,5,6-三苯基嘧啶-4-酮。
Cu(OAc)<sub>2</sub>-Catalyzed Tandem Blaise/Pinner-Type Reaction for One-Pot Synthesis of Pyrimidin-4-ones
作者:Yu Sung Chun、Ju Hyun Kim、Suh Young Choi、Young Ok Ko、Sang-gi Lee
DOI:10.1021/ol303153g
日期:2012.12.21
A novel tandemBlaise/Pinner-type reaction for the one-potsynthesis of pyrimidin-4-ones is described. The Blaisereactionintermediate, formed by addition of a Reformatsky reagent to a nitrile, reacted with a second nitrile chemoselectively in the presence of a catalytic amount of Cu(OAc)2 to afford pyrimidin-4-ones.