Synthesis of C-5′-alkyl substituted 17-spirofuran 19-norsteroids
摘要:
A number of new steroidal 17-spirofuran derivatives of the 19-nor series containing Me, Et or Pr-i-substituents in the heterocyclic moiety has been prepared, which are expected to have a strong progestagenic activity. The proposed approach made use of the 1,3-dipolar cycloaddition of low-molecular nitrile oxides with steroidal acetylenic alcohols followed by transformation of the isoxazole side chain. (C) 2001 Elsevier Science Inc. All rights reserved.
Synthesis of C-5′-alkyl substituted 17-spirofuran 19-norsteroids
摘要:
A number of new steroidal 17-spirofuran derivatives of the 19-nor series containing Me, Et or Pr-i-substituents in the heterocyclic moiety has been prepared, which are expected to have a strong progestagenic activity. The proposed approach made use of the 1,3-dipolar cycloaddition of low-molecular nitrile oxides with steroidal acetylenic alcohols followed by transformation of the isoxazole side chain. (C) 2001 Elsevier Science Inc. All rights reserved.