New approach to the preparation of steroids with connecting bridge, based on an O-carboxymethyloxime (CMO) structure, and with terminal hydroxy group, is presented. 17-CMO derivatives of 3β-acetoxy- and 3β-methoxymethoxyandrost-5-en-17-one were condensed with α,ω-amino alcohols to give derivatives with a chain of seven to nine atoms. After THP-protection, these compounds were converted to 3-keto-4-ene derivatives. An alternative synthesis consisted in transformation of 17-CMO derivatives with bonded amino acids by reduction of the terminal carboxyl. The resulting compounds were designed as building blocks for the preparation of bis-haptens for sandwich immunoassays.
基于具有连接桥的新类
固醇制备方法,基于一个带有羟甲酰
肟(CMO)结构和末端羟基的结构。将3β-乙酰氧基和3β-甲氧基甲氧基雄烯-17-酮的17-CMO衍
生物与α,ω-
氨基醇缩合,得到链长为七到九个原子的衍
生物。经过THP保护后,这些化合物被转化为3-酮-4-烯衍
生物。另一种合成方法是通过还原末端羧基,将带有
氨基酸键合的17-CMO衍
生物转化为目标化合物,这些化合物被设计为夹心免疫分析中的双半抗原的制备基础。