申请人:Eszakmagyarorszagi Vegyimuvek
公开号:US03953427A1
公开(公告)日:1976-04-27
The invention relates to a new and advantageous process for the preparation of substituted S-alkyl thiocarbamates having the general formula (I), ##EQU1## wherein R.sup.1 stands for a C.sub.1-4 alkyl group, R.sup.2 stands for a C.sub.1-4 alkyl or cyclohexyl group, or R.sup.1 and R.sup.2 may form together a C.sub.4-6 polymethylene group, and R.sup.3 stands for a C.sub.2-3 alkyl group. In accordance with the invention the substituted O-alkyl thiocarbamates of the general formula (II), ##EQU2## wherein R.sup.1, R.sup.2 and R.sup.3 each have the same meanings as defined above, are subjected to isomerization by heating them at a temperature of 130.degree. to 180.degree.C in the presence of dimethyl sulfate or diethyl sulfate to yield the appropriate S-alkyl esters.
该发明涉及一种新的和有利的过程,用于制备具有通式(I)的取代S-烷基硫代氨基甲酸酯,其中R.sup.1代表C.sub.1-4烷基基团,R.sup.2代表C.sub.1-4烷基或环己基团,或R.sup.1和R.sup.2可以一起形成C.sub.4-6聚亚甲基基团,而R.sup.3代表C.sub.2-3烷基基团。根据该发明,通式(II)的取代O-烷基硫代氨基甲酸酯,在存在二甲基硫酸酯或乙基硫酸酯的情况下,通过加热它们在130°C至180°C的温度下进行异构化,从而得到相应的S-烷基酯。