An acylcyclohexadionethiocarboxylic S-ester of the formula ##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.
公式为##STR1##的酰基环己二酮
硫代酯,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,而R2还可以是氢,通过在惰性溶剂中在0℃到150℃下用
羟胺或
羟胺- O-
磺酸与酰基环己二酮II反应,得到酰基环己二酮化合物III##STR3##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##STR4##其中X为酸的阴离子,并
水解化合物V得到酰基环己二酮
硫代酯I。