sulphonylformaldehyde hydrazones (70—80%), a previously unknown class of compounds, which arose by hydrolysis of the first formed phosphazine. The acylsulphonyldiazomethanes were prepared by the action of toluene-p-sulphonyl azide and triethylamine on β-ketosulphones in 60% aqueous ethanol. If the diazoketosulphone is retained in solution and the reaction period prolonged, sulphonylformaldehyde hydrazones may be
当在干燥的
甲醇中用
三乙胺处理时,酰基磺酰基
重氮甲烷会发生酰基裂解,从而生成α-重氮砜(约30%)。收率不佳归因于后处理过程中重氮砜的碱促进反应,因为在后处理中加入
三苯基膦会生成磺酰
甲醛(70-80%),这是一类以前未知的化合物,是通过
水解生成首先形成
磷嗪。酰基磺酰基
重氮甲烷是通过
甲苯-对磺酰基
叠氮化物和
三乙胺在60%的
乙醇水溶液中对β-酮砜的作用制得的。如果重
氮酮砜保留在溶液中并延长了反应时间,则可在添加三苯膦后直接分离出磺酰
甲醛。