反应详情

Following the procedure of Goldman et al. (U.S. Pat. No. 3,773,757), phenylmalonic acid (72 g., 0.40 mole), thionyl chloride (52.4 g., 0.44 mole) and dimethylformamide (0.070 ml.) are mixed in diisopropyl ether and refluxed for 2 hours. The resulting solution of phenylmalonic acid-half acid chloride is cooled and stored under an inert atmosphere until use. Following a procedure analogous to that of Goldman et al., benzhydryl alcohol (73.6 g., 0.40 mole) is added to the half-acid chloride solution and the mixture again refluxed for 2 hours. The volume is reduced by half, providing a diisopropylether solution of 2-phenyl-2-benzhydryloxycarbonylacetyl chloride used directly in the next step.

1. temperaturerefluxed for 2 hours
2. temperaturethe mixture again refluxed for 2 hours