Condensation of methyl 4-acetylphenylcarbamate with isatin in the presence of diethylamine afforded methyl 4-[(3-hydroxy-2-oxo-2,3-dihydro-1H-indol-3-yl)acetyl]phenylcarbamate which was converted into the corresponding chalcone on heating in glacial acetic acid in the presence of hydrochloric acid.

No abstract

No abstract

No abstract

Oxazine derivatives R 0595 Synthesis of Carbamate Derivatives of 2,3-Dihydro-4H-1,4-benzoxazine. -Reaction of o-hydroxyphenylcarbamates (I) with dibromoethane or chloromethyloxirane affords benzoxazine derivatives (III) and (V), respectively. -(VELIKORODOV*, A. V.; IMASHEVA, N. M.; Russ.