Synthesis 2020; 52(02): 208-218
DOI: 10.1055/s-0039-1690749
feature
© Georg Thieme Verlag Stuttgart · New York

Direct Transformation of Propargylic Alcohols and O,O-Diethyl Phosphorothioic Acid into S-(2H-Chromen-4-yl) Phosphorothioates

Xian-Rong Song
,
Tao Yang
,
Haixin Ding
,
Qiang Xiao
Institute of Organic Chemistry, Jiangxi Science & Technology Normal University, Jiangxi Province, Nanchang 330013, P. R. of China   Email: xiaoqiang@tsinghua.org.cn
› Author Affiliations
National Science Foundation of China (No. 21676131 and No. 21462019), the Science Foundation of Jiangxi Province (20181BAB203005 and 20143ACB20012), the Education Department of Jiangxi Province (GJJ180616), Jiangxi Science & Technology Normal University (2017QNBJRC004).
Further Information

Publication History

Received: 23 September 2019

Accepted after revision: 31 October 2019

Publication Date:
14 November 2019 (online)


Abstract

An environmentally benign and efficient method has been successfully developed to generate S-(2H-chromen-4-yl) phosphorothioates from easily available 2-(3-hydroxyprop-1-ynyl)phenols and O,O-diethyl phosphorothioic acid [(EtO)2P(O)SH] with water as the only byproduct. The reaction proceeds smoothly in moderate to excellent yields. It is noted that (EtO)2P(O)SH acts not only as an acid promoter, but also as the nucleophile to attack the allenic carbocation intermediate.

Supporting Information