作者:Olufemi A. Akanni、Brian A. Marple
DOI:10.1016/0039-128x(93)90025-i
日期:1993.5
Routes to the preparation of 16-formylestradiol are described. Estrone was converted to (E)-16-methoxymethylene estrone via the 16-hydroxymethylene estrone. Reduction of the methoxymethylene estrone with NaBH4 in the presence of CeCl3 gave 16-methoxymethylene estradiol. Deprotection by acid afforded the desired 16-formylestradiol. Attempts to prepare the 16-formylestradiol via the 16-butylthiomethylene
描述了制备16-甲酰基雌二醇的途径。雌酮通过16-羟基亚甲基雌酮转化为(E)-16-甲氧基亚甲基雌酮。在CeCl 3存在下用NaBH 4还原甲氧基亚甲基雌酮得到16-甲氧基亚甲基雌二醇。通过酸脱保护得到所需的16-甲酰基雌二醇。尝试通过16-丁基硫亚甲基衍生物制备16-甲酰基雌二醇只能得到16-甲磺酰基1,3,5(10),16-四烯-3-醇,而通过16-二甲氧基甲基衍生物的途径则是16-甲酰基丁烯-3-醇和16-甲酰基雌二醇的收率低。随后通过反应将16-甲酰基雌二醇转化为α-亚甲基内酯共轭物,4-(3,17β-二羟基estra-1,3,5(10)三烯-16-基)-2-亚甲基-4-丁醇化物。含α-(溴甲基)丙烯酸甲酯和锌。