Abstract
3-Methyl-5-phenyl-2, 4-dione-oxazolidine (I), m.p. 111-111.5°, and 3-methyl-5, 5-diphenyl-2, 4-dione-oxazolidine (II), m.p. 98-98.5°, were synthesized, by the condensation of guanidine and mandelic ester and benzilicester, respectively, saponification of 2-imino-4-oxazolidone compound here formeds and subsequent methylation with diazomethane. (I) can also be obtained by the condensation of mandelic ester and urethane with subsequent methylation. The yield by former method was 43% for (I) and 14% for (II), and that by the latter was 40.6% for (I). 5, 5-Dimethyl-3-diethylaminoethyl-2, 4-dione-oxazoli-dine (III), b.p.1 107-8°, was obtained by the application of diethylaminoeth chloride on 5, 5-dimethyl-2, 4-dione-oxazolidine with an yield on crude product of 65%, on purifiied product of 39%. (III) gives a hydrochloride of m.p. 186°.
