liquor was evaporated to yield a residue which was then washed with dilute sodium hydroxide and recrystallized from 95% ethanol to give 0.17 g. (25%) of the pyrimidone derivative 13b: m.p. 258-259°; X™r6.06 µ;C!Hi0H 265mM(e52,500), 289 (17,100), 300 (16,400), 322 (12,860); n.m.r. r 6.01 (1 proton) and 8.87 (9 protons).

Park and CroftLondon, for the use of their polarimeter and other laboratory facilities for the kinetic measurements. Finally, the author wishes to sincerely thank Martin Grossel at King's College for so generously sharing his limited laboratory and fumehood space, glassware, solvents, and routine laboratory chemicals and apparatus with a visitor from the "colonies."Registry No.-(+ )-l-Phenylbromoethane, 1459-14-9; (-)-lphenylbromoethane, 3756-40-9.