Abstract
Since their initial discovery by Ingold and Jessop in 1930, sulfur ylides have been
recognized as a highly versatile class of compounds in organic synthesis. Their reactivity,
which closely resembles that of diazo compounds, has enabled them to serve as valuable
surrogates for safe and stable carbene precursors, offering unique advantages in large-scale
syntheses. However, compared to diazo compounds, the catalytic asymmetric reactions
involving sulfur ylides, whether as substrates or intermediates, remain relatively
underexplored. In this account, we mainly summarize our recent advancements in this
area, focusing particularly on their applications in organocatalytic asymmetric X–H
(X = N, N3 , Cl, and C) insertion reactions. These reactions typically involve enantio-determining
and rate-determining C–X bond formation in combination with dynamic kinetic resolution,
thus leading to both high chemical efficiency and enantiocontrol.
1 Introduction
2 S–H Insertion Reactions of Sulfoxonium Ylides
3 N–H Insertion Reactions of Sulfonium Ylides
4 N–H Insertion Reactions of Sulfoxonium Ylides
5 One-Pot Sequential Ylide Formation and N–H insertion Reactions
6 N3 –H Insertion Reactions of Sulfoxonium Ylides
7 Chlorination of Sulfonium Salts
8 C–H Insertion Reactions of Sulfoxonium Ylides
9 Conclusion and Outlook
Key words organocatalysis - enantioselectivity - α-carbonyl - sulfonium ylide - sulfoxonium
ylide - sulfonium salt - N–H insertion