eight or ten such manipulations during 2-3 hr., the internal temperature could be raised to 132°where it was held without further incident for 30 min. The gray solid was collected, washed with water, and dried; it weighed 3.55 g., m.p. 203-207°( air). Recrystallization from ethyl' alcohol was accompanied by darkening of the solutions and consequent losses of material. However, by the judicious use of charcoal and filter aid the pure pyrrole IV was obtained, m.p. 223.2-224.3°, fa]n -58°, identical in spectra and analyses with that obtained from kryptogenin and methylammonium acetate.The aqueous filtrate from the reaction was treated with 250 ml. of 33% potassium hydroxide and extracted with ether. The washed and dried ethereal solution was evaporated, leaving 1.41 g. of crystalline material. This was the V-methylpyrrolidine V, crystallizing from ethyl acetate as needles, m.p. 214.0-215.2°(in vacuo), [
The facile rearrangement of 4-hydroxyquinoline and its derivatives in the presence of excess hydrazine hydrate gives rise to 5( o-aminophenyl )pyrazoles. These compounds in turn serve as intermediates in the synthesis of some new heterocycles, pyrazolo [ 1,5-c] quinazolines. The chemical and spectral properties of these substances are discussed.
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