Benzophenone semicarbazone (I) reacted with carbon monoxide at about 4000 p.s.i. and at 235–245° in the presence of preformed dicobalt octacarbonyl as catalyst to yield 3-phenyl-phthalimidine (II), 3-phenyl-2- (N benzhydrylcarboxamido)phthalimidine (V), N,N′-dibenzhydrylurea (VI), and N-benzhydrylurea (VII). At 200–220° substance I gave compound VII, benzophenone azine (VIII), and benzophenone 4-benzhydrylsemicarbazone (IX). When the reaction temperature was further reduced to 175–185°, compound I did not produce the carbonylation product obtained in the second experiment but only the degradation and reduction products VIII, and IX, respectively. Carbonylation of benzophenone azine at 235–245° produced 3-phenylphthalimidine, whereas that of benzophenone 4-benzhydrylsemicarbazone at the same temperature yielded 3-phenylphthalimidine and 3-phenyl-2-(N-benzhydrylcarboxamido) phthalimidine. Independent syntheses of the last compound and of benzophenone 4-benzhydrylsemicarbazone are described.
苯甲酮半
脲酮(I)在约4000磅力/平方英寸和235-245°的条件下,与预先形成的八羰基二
钴作为催化剂的
一氧化碳反应,生成3-苯基邻苯二
酰亚胺(II)、3-苯基-2-(N-苯基亚甲基羰胺)邻苯二
酰亚胺(V)、N,N'-二苯基亚甲基
脲(VI)和N-苯基亚甲基
脲(VII)。在200-220°下,物质I生成化合物VII、苯甲酮偶氮(VIII)和苯甲酮4-苯基亚
脲酮(IX)。当反应温度进一步降至175-185°时,化合物I并未产生第二次实验中获得的羰基化产物,而只生成降解和还原产物VIII和IX。苯甲酮偶氮在235-245°下的羰基化产生3-苯基邻苯二
酰亚胺,而苯甲酮4-苯基亚
脲酮在相同温度下的羰基化产生3-苯基邻苯二
酰亚胺和3-苯基-2-(N-苯基亚甲基羰胺)邻苯二
酰亚胺。描述了最后一种化合物和苯甲酮4-苯基亚
脲酮的独立合成。