Toluene → HCID 21454054, compound

Participants

Reaction Steps

To a solution of 19 parts of 7,15,16,17-tetrahydro-17,17-dimethyl-6H-cyclopenta[ a]phenanthren-3-ol in 800 parts of toluene is added 13 parts of a 50% dispersion of sodium hydride in mineral oil. The resultant mixture is stirred and heated at the boiling point under reflux in an atmosphere of nitrogen for 1 hour, then cooled, whereupon approximately 13 parts 2-bromo-2-methylpropanoic acid is introduced. The mixture thus obtained is stirred and heated at the boiling point under reflux in a nitrogen atmosphere for 4 hours, at which point heating is discontinued. The mixture is stirred 18 hours longer at ambient temperatures, then approximately 250 parts of water is cautiously introduced. The mixture so produced is extracted with benzene. The benzene extract is washed with water, dried over anhydrous sodium sulfate, and stripped of solvent by vacuum distillation. Crystallization of the residue from a mixture of ether and hexane affords 2-methyl-2-[(7,15,16,17-tetrahydro-17,17-dimethyl-6H-cyclopenta[a]phenanthren-3-yl)oxy]propanoic acid melting at 167°-170°, and having the formula ##STR7##

Provenance & Evidence