申请人:BASF Aktiengesellschaft
公开号:US05130453A1
公开(公告)日:1992-07-14
An acylcyclohexadionethiocarboxylic S-ester of the fomrula ##STR1## where R.sup.1 and R.sup.2 are substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, benzyl or phenyl, and R.sup.2 is additionally hydrogen, are prepared by reacting an acylcyclohexadione II ##STR2## with hydroxylamine or hydroxylamine-O-sulfonic acid in an inert solvent at from 0.degree. to 150.degree. C., to give an acylcyclohexadione compound III ##STR3## and then reacting the compound III with a mercaptan IV R.sup.2 --SH IV in the presence of an anhydrous acid HX to give an acylcyclohexadionethiocarboximidic S-ester salt V ##STR4## where X is the anion of the acid, and hydrolyzing the compounds V to the acylcyclohexadionethiocarboxylic S-ester I.
化合物I是一种含有以下式子的酰基环己二酮硫代酯:
##STR1##
其中,R1和R2是取代或未取代的烷基,烯基,炔基,环烷基,苄基或苯基,R2还可以是氢。该化合物的制备方法如下:将酰基环己二酮II和羟胺或羟胺-O-磺酸反应,在惰性溶剂中在0℃至150℃下,得到酰基环己二酮化合物III,然后在无水酸HX的存在下,将化合物III与巯基化合物IV R2-SH IV反应,得到酰基环己二酮硫代酰亚胺S-酯盐V,其中X是酸的阴离子,再将化合物V水解成酰基环己二酮硫代酯I。