Tetrahedron Letters

Synthesis of dihydrobenzo [1, 4] oxazines using copper catalyzed intramolecular ring closure reaction

P Jangili, J Kashanna, B Das

Index: Jangili, Paramesh; Kashanna, Jajula; Das, Biswanath Tetrahedron Letters, 2013 , vol. 54, # 26 p. 3453 - 3456

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Abstract

The synthesis of dihydrobenzo [1, 4] oxazines has been accomplished efficiently by copper catalyzed intramolecular cyclization of the adducts formed by the treatment of 1, 2-cyclic sulfamidates with 2-halo phenols. The products (except two) are new and their yields are high. The catalyst is easily available and less expensive.