Summary Nitrogen trichloride reacts with crotonic acid to form, among other products, a- chloro-P-dichloro-aminobutyric acid, which is changed by hydrochloric acid to/3-amino-a- chlorobutyric acid. The structure of the compound was established by reduction to the corresponding amino acid. A similar reaction occurs with cinnamic acid. The dichloro-amino group again enters the 6-position.
![(2-acetyl-[1]naphthyl)-glyoxylic acid Structure](https://image.chemsrc.com/caspic/126/859072-08-5.png)
