Synlett 2015; 26(09): 1201-1206
DOI: 10.1055/s-0034-1380493
letter
© Georg Thieme Verlag Stuttgart · New York

Photocatalytic Oxidative Heterocyclization of Semicarbazones: An Efficient Approach for the Synthesis of 1,3,4-Oxadiazoles

Ritu Kapoorr
Green Synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad 211 002, India   Email: ldsyadav@hotmail.com
,
Sachchida N. Singh
Green Synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad 211 002, India   Email: ldsyadav@hotmail.com
,
Shubhangi Tripathi
Green Synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad 211 002, India   Email: ldsyadav@hotmail.com
,
Lal Dhar S. Yadav*
Green Synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad 211 002, India   Email: ldsyadav@hotmail.com
› Author Affiliations
Further Information

Publication History

Received: 31 January 2015

Accepted after revision: 26 February 2015

Publication Date:
10 April 2015 (online)


Abstract

A highly efficient eosin Y catalyzed oxidative heterocyclization of semicarbazones was established under visible-light photoredox catalysis using CBr4 as a bromine source. The protocol renders a rapid, mild, and efficient access to valuable 5-substituted 2-amino-1,3,4-oxadiazoles in an operationally simple way utilizing visible light and atmospheric oxygen.

Supporting Information