Isatoic anhydride with carbanions

Coppola, G.M., Hardtmann, G.E., and Pfister, O.R., Chemistry of 2//-3,l-bcn/.oxazinc-2,4(l//)-dione (isatoic anhydride). Part 2. Reactions with thiopseudoureas and carbanions, J. Org. Chem., 41, 825,1976. Kabachnik, M.L, Rossiiskaya, P.A., and Shepeleva, E.S., Esters of a-keto phosphonic acids. Part 3. Two types of carboxylic acid derivatives, Izv. Akad. Nauk SSSR, Ser. Khim., 163, 1947 Chem. Abstr, 42, 4132i, 1948. 

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