Conversion of dehydroabietic acid (1) to a steroid skeleton was attempted. The oxo ester (3), an important intermediate in the synthesis of 4, was synthesized from 7 having a double bond in the A ring. It was confirmed that the oxo ester (3) has the α configuration at the 5-position.
尝试将
脱氢松香酸(1)转化为甾体骨架。氧代酯 (3) 是合成 4 的重要中间体,由 A 环上具有双键的 7 合成。经证实,氧代酯 (3) 在 5 位具有 α 构型。