Synthesis 2020; 52(11): 1687-1694
DOI: 10.1055/s-0039-1690823
paper
© Georg Thieme Verlag Stuttgart · New York

Sulfur/DABCO Promoted Reductive Coupling/Annulation Cascade Reaction between o-Hydroxy/Amino Nitrobenzenes and Benzaldehydes

Minh-Huy Dinh Dang
a   Department of Organic Chemistry, Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City (VNU-HCM) 721337, Vietnam   Email: thphuong@hcmus.edu.vn
b   Center for innovative Materials and Architectures, Vietnam National University, Ho Chi Minh City 721337, Vietnam
,
Linh Ho Thuy Nguyen
b   Center for innovative Materials and Architectures, Vietnam National University, Ho Chi Minh City 721337, Vietnam
,
Phuong Hoang Tran
a   Department of Organic Chemistry, Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City (VNU-HCM) 721337, Vietnam   Email: thphuong@hcmus.edu.vn
› Author Affiliations
Further Information

Publication History

Received: 14 December 2019

Accepted after revision: 21 January 2020

Publication Date:
13 February 2020 (online)


Abstract

Sulfur/DABCO was found to be an efficient reagent in promoting­ the reductive coupling/annulation of o-nitrophenols or o-nitroanilines with benzaldehydes. This method represents a simple, straightforward, and green approach to the construction of benz­oxazoles and benzimidazoles.

Supporting Information