申请人:Ciba-Geigy Corporation
公开号:US05110978A1
公开(公告)日:1992-05-05
A process for the preparation of compounds of formula I ##STR1## by reacting a phenol with formaldehyde and a thiol of formula HS--C.sub.n H.sub.2n --COO--R.sub.3 under excess pressure and in the presence of dimethylamine. The symbols R.sub.1 and R.sub.2 are independently alkyl, R.sub.3 is alkyl or alkyl interrupted by --O-- or --S--, and n is 1 or 2.
一种制备式I化合物的方法,通过在过量压力和二甲基胺的存在下,将苯酚与甲醛和公式为HS-C.sub.n H.sub.2n-COO-R.sub.3的硫醇反应。符号R.sub.1和R.sub.2独立地表示烷基,R.sub.3表示烷基或被-O-或-S-中断的烷基,n为1或2。