Publication Cover
Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 47, 2017 - Issue 14
483
Views
8
CrossRef citations to date
0
Altmetric
Original Articles

Ultrasound-assisted synthesis of 2-amino-1,3,4-oxadiazoles through NBS-mediated oxidative cyclization of semicarbazones

, , , , , & show all
Pages 1319-1325 | Received 16 Mar 2017, Published online: 07 Jun 2017
 

ABSTRACT

A ultrasound-assisted oxidative cyclization of semicarbazones using N-bromosuccinimide in the presence of sodium acetate was established providing efficient and rapid access to a variety of 2-amino-1,3,4-oxadiazoles. Moreover, the new synthetic protocol provides a simple procedure utilizing a safer oxidizing system that affords the target products in high regioselectivity, satisfactory yields, and elevated purities.

GRAPHICAL ABSTRACT

Acknowledgments

This work was supported by funds from the National Institute of Science and Technology on Tuberculosis (INCT-TB). L. A. Basso, D. S. Santos, and P. Machado are Research Career Awardees of the National Research Council of Brazil (CNPq). The fellowships from FAPERGS (A. F. Borsoi), CNPq (M. E. Coldeira), and CAPES (F. S. Macchi) are also acknowledged.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.