... The mole ratio of steroid/thallous ethoxide/acid chloride as recommended by Herz et al is l : 1.2 : 1.2. Marked deviations from this ratio invariably resulted in a lowering of yields. ... CHEM. 1T_, 3873 (1962). 4. Herz, JE, Cruz, S., and Murillo, A., STEROIDS '_, 111 (1977). ... Vol. ...