Since the study of homologous series has proved valuable for investigating a variety of physiologically active substances, 2 the preparation of a few members of the series which begins with cholanthrene and its 20-methyl derivative has been undertaken. The preparation of the 20-ethyl derivative (I) was accomplished in 1936, 3 but modifications in the general synthesis of Fieser and Seligman4 introduced some unexpected ...
![(7-ethyl-indan-4-yl)-[1]naphthyl-methanol Structure](https://image.chemsrc.com/caspic/461/861096-92-6.png)
![bis-[(7-ethyl-indan-4-yl)-[1]naphthyl-methyl]-ether Structure](https://image.chemsrc.com/caspic/121/854259-69-1.png)
