Access toward steroid skeleton and its derivatives via copper-catalyzed intramolecular cyclization: A short synthesis of estradiol and estrone

초록

A practical and efficient approach leading to [6,6,6,5] tetracyclic fused ring steroid skeletons (8 a–i) has been designed through copper catalyzed intramolecular [4+2] cycloaddition reaction of enyne-carbonyl substrates (7 a–i). The compound 8 a having OMe group at aromatic ring was further utilized to synthesize estradiol and Estrone.

키워드