The reactions of 2,4,6-trinitrotoluene with alkanethiols in the presence of K(2)CO(3) (the molar ratio of the reactants is 1 : 1 : 1) in dipolar aprotic solvents result in selective replacement of the ortho-nitro group to form 2-alkylthio-4,6-dinitrotoluenes, which can be oxidized to the corresponding sulfoxides or sulfones. The second ortho-nitro group can be replaced under the action of one more equivalent of alkanethiol oil sulfides as exemplified in PhCH(2)SH.
New procedure for nucleophilic sulfonation of aromatic nitro compounds: Destructive oxidation of S-arylthioglycolic acids esters
作者:M. D. Dutov、O. V. Serushkina、S. A. Shevelev
DOI:10.1134/s1070428007080131
日期:2007.8
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).