Preparation of phthalamic acid derivatives and ring closure to phthalimidobarbituric acids
作者:Agnieszka Ambrożk、Michael Gütschow
DOI:10.1002/jhet.5570440606
日期:2007.11
Phthalamicacid derivatives with a barbiturate moiety were prepared from 5-amino-5-ethylbarbituric acids. To circumvent an undesired acetylation in glacial acetic acid during the preparation of phthalimidobarbituric acids, two routes were proven exemplarily. On the one hand, a phthalamicacid (6a) was isolated and subsequently cyclized with acetic anhydride to the corresponding phthalimide 2a. On the