[6] Ber. 19, 1398 (1886),
[7] Ber. 10, 1166 (1877); Am. Chem. J. 18, 333 (1896); J. Am. Chem. Soc. 32, 116 (1910); Z. angew. Chem. 32, I, 301 (1919).
[1b] J. Am. Chem. Soc. 42, 1282 (1920).
[2b] J Am. Chem. Soc. 18, 680 (1896); 20, 654 (1898).
[3b] Rec. trav. chim. (I) 11, 93 (1892).
[4b] Ber. 30, 1698 (1897).
Of these, the first three are the only ones which need be considered as methods for the preparation of phthalimide. It was found that the third was by no means easy to bring about: dry phthalic anhydride is apparently only superficially affected by the dry ammonia, and it was difficult to introduce sufficient heat into the loose mass of crystals to cause the reaction to start.
XXI
QUINOLINE
/ \ / \ C3H5(OH)3 + C6H5NH2 + 4O(C6H5NO2)—> | | | + 4H2O \ / \n/