Synthesis 2020; 52(03): 471-478
DOI: 10.1055/s-0039-1690213
paper
© Georg Thieme Verlag Stuttgart · New York

Metal-Free Oxidative Coupling of Tetrahydroisoquinolines and 3-Fluorooxindoles on Water

Jian Ji
,
Ling-Yan Chen
,
Zi-Bin Qiu
,
Xinfeng Ren
,
Ya Li
Natural Science Foundation of Shanghai (16ZR1413800) and Shanghai University of Engineering and Science (2012td09, nhrc-2015-09)
Further Information

Publication History

Received: 10 September 2019

Accepted after revision: 30 September 2019

Publication Date:
21 October 2019 (online)


Abstract

An efficient, metal-free oxidative coupling of tetrahydroisoquinolines and 3-fluorooxindoles on water has been developed. Using aqueous tert-butyl hydroperoxide as the oxidant, Et3N as the base, and water as the sole solvent, a variety of 3-fluorooxindoles fully substituted at the 3-position and containing a tetrahydroisoquinoline fragment has been successfully prepared in yields of up to 93% with an anti/syn stereo­selectivity of up to 99:1 under very mild and safe reaction conditions.

Supporting Information