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Synthesis 2016; 48(23): 4117-4125
DOI: 10.1055/s-0035-1562610
DOI: 10.1055/s-0035-1562610
paper
Synthesis of Bicyclic Boron Heterocycles Containing [1,3,4,2]Oxadiazaborole and [1,3,2]Oxazaborine
Further Information
Publication History
Received: 24 June 2016
Accepted after revision: 11 July 2016
Publication Date:
17 August 2016 (online)
Abstract
Boron triacetate, generated in situ, reacts with various 3-(2-acylhydrazono)-2-(2-phenylhydrazono)butanoic acids to give 4-acetoxy-2-aryl-8-methyl-6-oxo-7-phenylhydrazono-2H,4H,6H,7H,8H-[1,3,4,2]oxadiazaborolo[2,3-b][1,3,2]oxazaborines in good yields. These derivatives represent a class of new zwitterionic, tetrahedral boron heterocycles. X-ray single-crystal analyses of one of the starting (acylhydrazono)butanoic acids as well as of one heterocyclic boron product are reported.
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