Syntheses of Heterocyclic Compounds of Nitrogen. CXXVI. Syntheses of Oxazolopyridines and Related Compounds. (7)

1) 7-Substituted 2-methyl- or 2-phenyl-oxazolo [4, 5-c] pyridines were prepared from 3, 5-dinitro-4-hydroxypyridine and some of them were hydrogenated over palladium-carbon or Raney nickel. 2) By examination of the hydrolysis products of 2-methyl-7-nitro (or bromo)-oxazolo-[4, 5-c] pyridine monomethiodide and 2-methyloxazolo [4, 5-b] pyridine monomethiodide, it was confirmed that methyl iodide combined with nitrogen atom in the pyridine ring of oxazolopyridine system.