Synlett 2018; 29(15): 2051-2055
DOI: 10.1055/s-0037-1610259
letter
© Georg Thieme Verlag Stuttgart · New York

Chloramine Salt Mediated Oxidative Halogenation of Terminal Alkynes with KI or NaBr: Practical Synthesis of 1-Bromoalkynes and 1-Iodoalkynes

Xiaozu Liu
,
Guojun Chen
,
Chenglong Li
,
Peijun Liu*
Generic Drug Research Center of Guizhou Province, Green Pharmaceuticals Engineering Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, 563000, P. R. of China   Email: pjliu@zmc.edu.cn
› Author Affiliations

Financial support from the National Natural Science Foundation of China (No. 21562052 and 21462055), the Guizhou Provincial Department of Science and Technology (No. LH[2014]7547, and LH[2014]7554), 15851 Talent Project Funding of Zunyi city (No. 201423), as well as National First-Rate Construction Discipline of Guizhou Province (Pharmacy) (YLXKJS-YX-04), and the Fifth Batch of Talent Base in Guizhou Province (2016) are gratefully acknowledged.
Further Information

Publication History

Received: 27 June 2018

Accepted after revision: 26 July 2018

Publication Date:
22 August 2018 (online)


Abstract

A direct oxidative halogenation of terminal alkynes has been realized using chloramine-B as the oxidant and KI or NaBr as the halogen source. This reaction enables a general and practical access to synthetically valuable 1-bromoalkynes and 1-iodoalkynes in good to excellent yields under mild reaction conditions.

Supporting Information