Synthesis 2022; 54(02): 421-428
DOI: 10.1055/a-1643-8526
paper

Enantioselective Transfer Hydrogenation of Oxocarbenium Ions Enables Asymmetric Access to α-Substituted 1,3-Dihydroisobenzofurans

Likai Zhou
a   School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. of China
,
Kuiyong Jia
b   Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, P. R. of China
,
Xigong Liu
a   School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. of China
,
Lei Liu
a   School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. of China
› Author Affiliations
This work was financially supported by the Postdoctoral Innovation Project of Shandong Province (No. 202001003), the National Science Foundation of China (No. 21801093), and China Postdoctoral Science Foundation (No. 2019M662321).


Zoom Image

Abstract

Reported here is an efficient enantioselective transfer hydrogenation of cyclic oxocarbenium ions generated in situ through collapse of the corresponding acetal substrates. The asymmetric approach provides straightforward access to a variety of chiral α-aryl substituted 1,3-dihydroisobenzofurans in high yields with excellent enantioselectivities. α-Alkynyl substituted 1,3-dihydroisobenzofurans were also proved to be suitable substrates. In addition, when the reaction was performed at gram scale, the desired product was obtained in good yields with excellent enantioselectivity.

Supporting Information



Publication History

Received: 22 July 2021

Accepted after revision: 17 August 2021

Accepted Manuscript online:
13 September 2021

Article published online:
17 September 2021

© 2021. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany