Polyphosphoric Acid as a Reagent in Organic Chemistry. IX. 1 Cyclization to Diaminoacridines2

HR Snyder, MS Konecky

Index: Snyder; Konecky Journal of the American Chemical Society, 1958 , vol. 80, p. 4388

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Citation Number: 23

Abstract

11c. 1.>, icltl (,<: $(,).'l'hc lizatioii iii Iiolp1) licis-Iihoric acid iiia>-coiistitut better general method tliaii that recorded in the literature. 6 The hot rcactiori melt is poured into cold water and the red i) hosphate salt of I1 precipitates. The acid salt is collected by filtration and treated with excess base; the free dianiinoacridirie base obtained is of excel-