2-Phenyl-4-benzal-5-oxazolone

Barbituric acid, 32, 7 Barium D-gulonate, 36, 39 Behenic acid, 37, 69 Beilstein test, 34, 38 Benzaldehyde, 30, 100 33, 70 34, 65 Benzaldehyde, p-AMINO, 31, 6 />-DIMETHYLAMINO-, 33, 27 Benzaldehyde, purification of, 33, 71 Benzalmalonic acid, ethyl ester, 37, S 4-Benzal-2-phenyl-5-oxazolone, 37, S Benzamidine, N,N -diphenyl-, 31, 48 N-phenyl-, 36, 64 Benzanilide, 31, 48... 

Benzal-2-phenyl-5-oxazolone, 37, S Benzamidine, N,N -diphenyl-, 31, 48 N-phenyl-, 36, 64 Benzanilide, 31,48... 

Phenyl-4-benzal-5-oxazolone. One gram of benzoylaminocin-namic acid is heated on the steam cone for five minutes with 10 cc. of... 

Detailed descriptions of the preparations of three azlactones by condensations of aldehydes with acylglycines are given in Organic Syntheses. These include the ntheses of 2-methyl-4-benzal-5-oxazolone from benzaldehyde and acetylglycine, 2-phenyl-4-benzal-5-oxazolone from benzaldehyde and hippuric acid, and 2-phenyl-4 (3, 4 -dimethoxyben-, zal)-5-oxazolone from veratraldehyde and hippuric add. ... 

Azlactones can be hydrolyzed to the corresponding acids with either alkaline or acidic reagents, the alkalies being conaderably more effeo- tive. The ease of the reaction depends to a marked extent upon the nature of the substituents on the oxazolone ring. Unsaturation in the 4-position or an aryl group in the 2-position stabilizes the mdecule. Thus 2-methyl-4-benzyl-5-oxazolone is hydrolyzed by water at room temperature, 2-methyl-4-benzal-5-oxazolone by boiling aqueous acetone, and 2-phenyl-4-benzal-5-oxazolone by boiling 1% aqueous sodium hydroxide. ... 

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