Synlett 2024; 35(12): 1441-1445
DOI: 10.1055/a-2202-0842
letter

Enantioselective Sulfonation of Enones with Sulfinates by Thiourea/Tertiary-Amine Catalysis

Si-fan Wang
a   Department of Basic Sciences, Shanxi Agricultural University, Taigu, Shanxi, 030800, P. R. of China
b   Natural Product Research Center, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, P. R. of China
,
Ming Yan
a   Department of Basic Sciences, Shanxi Agricultural University, Taigu, Shanxi, 030800, P. R. of China
b   Natural Product Research Center, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, P. R. of China
,
Jin-yi Shi
a   Department of Basic Sciences, Shanxi Agricultural University, Taigu, Shanxi, 030800, P. R. of China
b   Natural Product Research Center, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, P. R. of China
,
Guang-xun Li
b   Natural Product Research Center, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, P. R. of China
,
Jin-zhong Zhao
a   Department of Basic Sciences, Shanxi Agricultural University, Taigu, Shanxi, 030800, P. R. of China
› Author Affiliations
The West Light Foundation of the Chinese Academy of Sciences (25E0C30), and the Sichuan Science and Technology Program (2021ZYD0061).


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Abstract

Chiral γ-keto sulfones are significant structures in both organic synthesis and pharmaceutical chemistry. Although there are many choices for obtaining racemic forms, only a few enantioselective methods have been reported. We have developed a simple way for obtaining chiral γ-keto sulfones in moderate yields and moderate enantiomeric ratios. Readily available sulfinates were directly used as substrates that could be converted into sulfinic acids by treatment with boric acid. The bifunctional catalyst forms a chiral ion pair with the sulfinic acid and controls the enantioselectivity of the sulfonation through hydrogen bonding.

Supporting Information



Publication History

Received: 24 August 2023

Accepted after revision: 31 October 2023

Accepted Manuscript online:
31 October 2023

Article published online:
30 November 2023

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