The Pummerer rearrangement reaction of 2- or 3-substituted 4-(phenylsulfinyl) butyricacids in the presence of an excess amount of acetic anhydride and a catalytic amount of p-toluenesulfonic acid in refluxing toluene for 1 h afforded 2- or 3-substituted 4-phenylthio-4-butanolide (17a–f). Thermolysis in pyridine of 4-phenylsulfinyl 4-butanolides, which were prepared by oxidation of 17a–f, afforded
There are disclosed compounds of formula (I) ##STR1## and pharmaceutically acceptable salts thereof which are useful as antagonists of GnRH and as such may be useful for the treatment of a variety of sex-hormone related and other conditions in both men and women.
Butenolide herbicides and process for their preparation
申请人:——
公开号:US04340732A1
公开(公告)日:1982-07-20
New butenolide derivatives of the formula ##STR1## a process for preparing them and herbicidal compositions containing them. These derivatives are useful in the control of parasitic weeds of the genera Striga and Orobanche.