Reaction of Diphenylcyclopropenethione with Pyridinium Imines
作者:J. W. Lown、K. Matsumoto
DOI:10.1139/v72-090
日期:1972.2.15
Reaction of diphenylcyclopropenethione with a variety of N-substituted pyridinium imines in refluxing benzene gives 2,4,5-trisubstituted-6H-1,3-oxazin-6-thiones in good to excellent yields. The structure of 2,4,5-triphenyl-6H-1,3-oxazin-6-thione prepared in this manner was proven by oxidation and by hydrolysis to the known 2,4,5-triphenyl-6H-1,3-oxazin-6-one. In the preparation of 4,5-diphenyl-2-ethoxy-6H-1
Reactions of Azomethine Derivatives. IV. The Synthesis of 2,3,5-Trisubstituted 2-Pyrrolin-4-ones and Their Oxidation to 2,4,5-Trisubstituted 1,3-Oxazin-6-ones
The reaction of aromatic azines with diphenylcyclopropenone in refluxing toluene gave 5-aryl-2,3-diphenyl-2-pyrrolin-4-ones (4) in moderate yields via initial [2+3] 1:1 cycloaddition and subsequent elimination of an aromatic nitrile from the adducts. Treatment with phosphorus pentasulfide deoxygenated the compounds 4 to 5-aryl-2,3-diphenyl-pyrroles. The same compounds 4 were oxidized to 2-aryl-4,5-diphenyl-1
azalactone structure. In the presence of catalytic K2CO3 at 60 °C in THF, the disubstituted cyclopropenone couples with benzamides, acrylamides, and a phenylacetamide to produce 2,4,5-trisubstituted 1,3-oxazin-6-ones in 23–99% yield.
报道了环丙烯酮和N-(新戊酰氧基)酰胺之间的碱催化的[3 + 3]型环。将1,3-N,O-偶极形式正式插入环丙烯酮C C键会产生六元氮杂内酯结构。在60°C的THF中存在催化性K 2 CO 3的情况下,双取代的环丙烯酮与苯甲酰胺,丙烯酰胺和苯乙酰胺偶合,可在23–99中产生2,4,5-三取代的1,3-恶嗪-6-酮。 % 屈服。
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。
Reaction of N-(p-tolylsulfonyl)diphenylcyclopropenimine with pyridinium and isoquinolinium ylides
作者:Ronaldo Aloise Pilli、J. Augusto R. Rodrigues、Albert Kascheres