Free radical cyclization reactions of allylsulfonyl substituted N-aryl amide derivatives
作者:Che-Ping Chuang、An-I Tsai、Ming-Yi Tsai
DOI:10.1016/j.tet.2013.02.009
日期:2013.4
p-Toluenesulfonyl radical can be generated by the manganese(III) acetate oxidation of sodium p-toluenesulfinate. The corresponding alkyl radicals could be produced effectively by the p-toluenesulfonyl radical induced radical reaction of allylsulfonyl substituted N-aryl amides. These alkyl radicals undergo 5-exo-trig, 6-endo-trig, or 6-exo-trig cyclization onto the aromatic ring effectively. The product
对甲苯磺酰基可通过对甲苯磺酸钠的乙酸锰(III)氧化而产生。通过对甲苯磺酰基自由基引起的烯丙基磺酰基取代的N-芳基酰胺的自由基反应可以有效地产生相应的烷基。这些烷基可有效地在芳香环上进行5- exo - trig,6- endo - trig或6- exo - trig环化。产物分布高度取决于芳环的取代基和自由基中间体的稳定性。这个p-甲苯磺酰基自由基诱导的反应提供了用于合成二氢喹啉酮,氮杂螺环环己二烯和螺二氢喹啉酮的合成上有用的方法。