Anal., Calcd. for C21HzsOa. H20: C, 72.80; H, 8.73. Found: C, 72.77, 72.63; H, 8.69, 8.61. Attempted Acetonide Formation with Estriol-3-methyl Ether.-Estriol-3-methyl ether (350 mg., mp 157-158") was covered with 35 cc. of anhydrous acetone and treated with 5 cc. of 8% hydrogen chloride in absolute acetone as usual. After thirty minutes swirling, 50 cc. of aqueous potassium carbonate (e 1.5 g. of potassium carbonate) was added in one portion ...
