Synthesis of silenosterone, an insect-molting hormone
摘要:
Silenosterone is synthesized in five steps: acetylation of 2-desoxy-alpha-ecdysone (1), saponification of 2-desoxy-alpha-ecdysone-3,22-diacetate (2) to the 22-monoacetate (3), and oxidation of the latter to a ketone (4) and its base hydrolysis (5). The structures of the compounds are confirmed by PMR, IR spectroscopy, and mass spectrometry.