A FACILE METHOD WITH IMPROVED YIELDS IN THE SYNTHESIS OF 6-ARYLPYRIDO [2′, 3′: 4, 5] PYRIMIDO [1, 6-a] BENZIMIDAZOLES

G Suma, RH Bahekar, ARR Rao

Index: Suma; Bahekar; Rao Organic Preparations and Procedures International, 2000 , vol. 32, # 1 p. 99 - 101

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Citation Number: 6

Abstract

Melting points were determined in open capillaries on a Thermonik Precision Melting Point cum Boiling Point Apparatus-Model C-PMl3-2 and are uncorrected. Column chromatography and tlc were performed on silica gel (230-400 mesh) and on precoated plates (E. Merck Kieselgel 60 F2%) respectively. IR spectra were recorded using KBr pellets on Perkin-Elmer Infrared 337 spectrophotometer and'H NMR spectra were recorded on a ...