MIXED ESTER OF SUCCINIC ACID WITH 4-(3-ALKOXY-3-ALKYL-2-BROMOBUTOXY)PHENYLALKANOL AND 3 BETA,5-DIHYDROXY-5 ALPHA-CHOLESTANE-6-ON AS BIOLOGICALLY ACTIVE SUBSTANCE AND METHOD OF ITS PREPARATION

摘要

The object of the solution are the new biologically effective substances of the general formula I, where the symbol R1 stands for methyl group or ethyl group, the symbols R2 and R3 stand for alkyl group with a straight or branched chain with a maximum of 3 atoms of carbon. Their pesticide effects were tested e.g. on insects. The next part of the solution is the process of the preparation of substances of the general formula I that is based upon the reaction of monoester derivate of the general formula II, where the symbols R1, R2, R3 have the above mentioned meaning at a presence of an equimolar quantity of dicyclohexylcarbodiimide and catalytic quantity of 4-dimethylaminopyridine in a medium of non-aqueous diethyl ether at a temperature of 15 to 25 degrees C with 3 β, 5 - dihydroxy-5 α -cholestane-on.IMAGE