Synthesis of 6(E)- and 6(Z)-(3-ethoxycarbonylpropyl)oximes of 16α, 17α-cyclohexanopregn-4-ene-3,6,20-trione and study of their interaction with proteins of the rat uterine cytosol and blood serum

Abstract

6(E)- and 6(Z)-(3-Ethoxycarbonylpropyl)- and -(3-carboxypropyl)oximes of 16α,17α-cyclohexanopregn-4-ene-3,6,20-trione were synthesized. The reactions of these ester ligands with pentarane-binding proteins of the uterine cytosol and blood serum were studied; the latter exhibits a higher affinity. The preferred binding of the oxime (E)-isomer relative to the (Z)-isomer was noted.