Patent ID: 7781581
Filing Date: 2010-08-24
Classification: C07D

Abstract:
1. A process for the preparation of 5-amino-3H-thiazolo[4,5-d]pyrimidin-2-one of formula comprising: (i) halogenating a 2,4-diaminopyrimidine of formula (ii) cyclocondensing the 2,4-diamino-5-halo-pyrimidine to form 5-amino-3H-thiazolo[4,5-d]pyrimidin-2-thione of formula (iii) oxidizing the 5-amino-3H-thiazolo[4,5-d]pyrimidin-2-thione to form 5-amino-3H-thiazolo[4,5-d]pyrimidin-2-one.