Structural Modification of Bioactive Compounds. I. Syntheses of Vitamin D Analogues I

抄録

Three vitamin D analogues, (25R)-9, 10-seco-spirosta-5, 7, 10 (19)-trien-3β-ol (I), 17β (N-methyl-N-4-methylpentylamino)-9, 10-seco-androsta-5, 7, 10 (19)-trien-3β-ol (II), and (20S)-20-iso-pentylamino-9, 10-seco-pregna-5, 7, 10 (19)-trien-3β-ol (III), were prepared starting from diosgenin (IVa), 3β-hydroxy-5-androsten-17-one (Va), and 3β-hydroxy-5-pregnen-20-one (VIa), respectively, via the adducts of the corresponding 5, 7-dienes and 4-phenyl-1, 2, 4-triazoline-3, 5-dione.