Microwave-assisted one-pot synthesis of benzo [b][1, 4] oxazin-3 (4H)-ones via Smiles rearrangement

…, KH Hwang, YK Cho, S Chandrasekhar, CR Reddy…

Index: Zuo, Hua; Meng, Lijuan; Ghate, Manjunath; Hwang, Kyu-Hyeon; Kweon Cho, Yong; Chandrasekhar; Raji Reddy; Shin, Dong-Soo Tetrahedron Letters, 2008 , vol. 49, # 23 p. 3827 - 3830

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Citation Number: 35

Abstract

An efficient method for the synthesis of benzo [b][1, 4] oxazin-3 (4H)-ones via Smiles rearrangement using a microwave-assisted one-pot, three-step reaction has been developed. Various benzo [b][1, 4] oxazin-3 (4H)-ones are obtained in good yields (55– 86%) from the corresponding substituted 2-chlorophenols and primary amines in short reaction time (18–40min).