New procedure for nucleophilic sulfonation of aromatic nitro compounds: Destructive oxidation of S-arylthioglycolic acids esters
摘要:
A new reaction was discovered: oxidative destruction of sulfides of ArSCH(2)CO(2)Me type to sulfonic acids ArSO(3)H effected by 70% HNO(3). This reaction was used to introduce an SO(3)H group instead of aromatic nitro group activated only by meta-substituents: At treating with HSCH(2)CO(2)Me + K(2)CO(3) the NO(2) group was substituted to form ArSCH(2)CO(2)Me with subsequent transformation into ArSO(3)H. p-Fluoronitrobenzene behaved similarly (with replacement of the fluorine).