作者:Malcolm R. Banks、Robert F. Hudson
DOI:10.1039/p29860001211
日期:——
The reaction of several N-methylhydroxamic acids with methane- and benzene-sulphinyl chloride is shown to give an isolatable O-sulphinylated intermediate (IV) below 0 °C. The intermediates decompose at ambient temperatures with simultaneous N–O and S–O bond fission to give the isomeric N-acyl-N-methylsulphonamide (V) and N-methyl-O-sulphonylhydroxamic acid (VI) by in-cage and free pair radical recombination
几种N-甲基异羟肟酸与甲烷和苯磺酰氯的反应表明,在0°C以下可得到可分离的O-磺酰化中间体(IV)。中间体在环境温度下分解,同时发生N-O和S-O键裂变,通过笼内和自由对生成N-酰基-N-甲基磺酰胺(V)和N-甲基-O-磺酰基异羟肟酸(VI)的异构体自由基重组。1 H和13 C nmr光谱在磺酰胺(V)和O中均显示强极化-磺酰基异羟肟酸(VI),表明自由基笼机制。另外,由于N-酰基-N-甲基硝基氧自由基(X),观察到强的esr信号。