The following examples are given to illustrate the methods used to prepare the compounds listed in Tables I and TI. In general the experimental details varied very little from preparation to preparation. 4-Chloroisatoic anhydride. Phosgene was bubbled at mom temperature through a solution of 85.8 g.(0.500 mole) of 4chloroanthranilic acid'and 33.5 g.(0.316 mole) of sodium carbonate in 1750 ml. of water. The pH of the reaction mixture was maintained ...
