Primary amines and diethylamine react with oxazolo[4,5-b]pyridine thione to form N-(3-hydroxy-2-pyridyl)thioureas whereas cyclic secondary amines and aniline form 2-aminooxazolo[4,5-b]pyridines. Exchange of the benzene ring in benzoxazolinethione for pyridine causes the properties of the resultant oxazolopyridine-2-thione to resemble those of 5- and 6-nitrobenzoxazolinethiones.

Oxazolo[4,5-b]pyridine-2-thione reacts with amines to form N-(3-hydroxy-2-pyridyl)thioureas, while cyclic secondary amines and aniline form 2-aminooxazolo[4,5-b]pyr

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Reaction of 3H-oxazolo[4,5-b]pyridine-2-thione with amines

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