Disodiophenylacetate, prepared from phenylacetic acid and two molecular equivalents of sodium amide in liquid ammonia, underwent conjugate addition to ethyl ciniiamate to form erythro-and threo-4-carbethovv-2, 3-diphenylbutyric acids in approvimately equal amounts. The configurations of these isomers were established by hj-drolysis and by esterification to the diacids and diethyl esters, respectively. The conjugate addition appeared to occur ...
![(5Z)-5-[(benzo[1,3]dioxol-5-ylamino)methylidene]-1-(2,5-dimethoxyphenyl)-1,3-diazinane-2,4,6-trione Structure](https://image.chemsrc.com/caspic/080/5394-85-4.png)
