1, 3-Dibromo-5, 5-dimethylhydantoin as an efficient homogeneous catalyst for synthesis of benzoxazoles, benzimidazoles, and oxazolo [4, 5-b] pyridines

SF Hojati, B Maleki, Z Beykzadeh

Index: Hojati, Seyedeh Fatemeh; Maleki, Behrooz; Beykzadeh, Zahra Monatshefte fur Chemie, 2011 , vol. 142, # 1 p. 87 - 91

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Citation Number: 17

Abstract

Abstract A simple and highly efficient method for synthesis of benzoxazoles, benzimidazoles, and oxazolo [4, 5-b] pyridines is described. Condensation of orthoesters with o-substituted anilines or 2-amino-3-hydroxypyridine was performed in the presence of catalytic amounts of commercially available, inexpensive, and moisture-stable 1, 3-dibromo- 5, 5-dimethylhydantoin under solvent-free conditions. The corresponding heterocycles ...