… the Ullmann-ether reaction: A concise and amenable synthesis of novel dibenzoxepino [4, 5-d] pyrazoles by intramolecular etheration of 4, 5-(o, o'-halohydroxy) …

…, R SanMartin, F Churruca, E Domínguez

Index: Dominguez, Esther; Lete, Esther; Villa, M. Jesus; Iriondo, Carmen Heterocycles, 1984 , vol. 22, # 5 p. 1217 - 1224

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Citation Number: 49

Abstract

A concise synthesis of a series of novel dibenzoxepino [4, 5-d] pyrazoles was accomplished by implementation of an intramolecular Ullmann-ether reaction on o, o'-halohydroxy-4, 5- diarylpyrazoles mediated by CuBr⊙ DMS. An alternative useful approach based on the