DABCO‐Mediated Photoelectrochemical Three‐Component Sulfonocyclization of 3‐Aza‐1,5‐dienes DOI

Lu-Cai Ding,

Gui-Hong Yang,

Li Luo

et al.

Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 2, 2024

Comprehensive Summary Herein, we report a rare example of three‐component net‐oxidative sulfonylation SO 2 surrogate with an oxidatively activated radical precursor under mild and metal‐ external‐oxidant‐free conditions. The mildness sustainability the reaction are enabled by photoelectrocatalysis, 3‐aza‐1,5‐dienes, organotrifluoroborates 1,4‐diazabicyclo[2.2.2]octane bis(sulfur dioxide) adduct (DABSO) undergo sulfonylative cyclization to afford sulfono 4‐pyrrolin‐2‐ones in atom‐economical manner broad substrate scope good functional‐group tolerance. protocol is amenable late‐stage diversification complex molecular architectures as well gram‐scale synthesis. Sunlight could be used light source, conducted all‐solar mode using commercially available photovoltaic panel generate electricity situ . Mechanistic studies reveal that generated (DABCO), which was generally innocent previous reactions, functions electron shuttle between photocatalytic cycle reactants.

Language: Английский

Multicomponent Reactions Based on SO2 Surrogates: Recent Advances DOI
Gang Chen, Zhong Lian

European Journal of Organic Chemistry, Journal Year: 2023, Volume and Issue: 26(25)

Published: April 25, 2023

Abstract Compounds containing sulfonyl‐derived functional groups have received intensive attention owing to their widespread applications in life science, pharmaceuticals and materials science. To access this type of compounds, the multi‐component sulfonylation reactions relying on sulfur dioxide (SO 2 ) insertion strategy emerged as novel attractive approaches past decade. The utilization SO surrogates for multicomponent (MCRs) improved reaction flexibility step economy. Moreover, some advances been achieved challenging but practical asymmetric MCRs construction high value‐added chiral sulfones. This review aims summarize progress made involving from 2019 2022, point out potentials challenges field.

Language: Английский

Citations

23

Asymmetric Sulfonylation from a Reaction of Cyclopropan-1-ol, Sulfur Dioxide, and 1-(Alkynyl)naphthalen-2-ol DOI
Chun Zhang, Shengqing Ye, Jie Wu

et al.

Organic Letters, Journal Year: 2024, Volume and Issue: 26(15), P. 3321 - 3325

Published: April 10, 2024

Asymmetric sulfonylation from a reaction of cyclopropan-1-ol, sulfur dioxide, and 1-(alkynyl)naphthalen-2-ol in the presence catalytic amount organocatalyst at room temperature is developed. Axially chiral (S)-(E)-1-(1-(alkylsulfonyl)-2-arylvinyl)naphthalen-2-ols are generated moderate to good yields with excellent enantioselectivity regioselectivity under mild conditions. During this transformation, γ-keto sulfinate situ cyclopropan-1-ol dioxide acts as key intermediate.

Language: Английский

Citations

9

Oxidative sulfonylarylation of strained C–C σ-bonds for the synthesis of 3-spirocyclic oxindoles initiated by insertion of sulfur dioxide DOI
Jian-Hong Fan, Jing Yuan, Long‐Jin Zhong

et al.

Organic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(7), P. 1982 - 1989

Published: Jan. 1, 2024

Sulfonylarylation of bicyclobutyl N -aryl amides via radical cascade cyclization for constructing 3-spirocyclic oxindoles has been disclosed.

Language: Английский

Citations

7

Photocatalytic Radical Cascade Cyclization of N-(o-Cyanobiaryl)acrylamides with Sulfonyl Chlorides DOI
Min Gao, Jian-Hong Fan, Yu Liu

et al.

The Journal of Organic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

A photoredox-catalyzed radical cascade cyclization of N-(o-cyanobiaryl)acrylamides with sulfonyl chlorides for the construction sulfonyl-containing pyrido[4,3,2-gh]phenanthridines has been disclosed. The developed synthetic tool tolerates a broad range to undergo sequence, including addition, nitrile insertion, and cyclization.

Language: Английский

Citations

1

Copper-Catalyzed 1,4-Trifluoromethylthio-Arylsulfonylation of 1,3-Enynes via the Insertion of Sulfur Dioxide DOI

Hongzhuo Song,

Xuemei Zhang, Gang Chen

et al.

Organic Letters, Journal Year: 2023, Volume and Issue: 25(31), P. 5916 - 5921

Published: July 27, 2023

A copper-catalyzed trifluoromethylthio-arylsulfonylation between 1,3-enynes, AgSCF3, aryldiazonium tetrafluoroborates, and SO2 (from SOgen) is presented, which could introduce sulfone, SCF3, allene moieties into one molecule simultaneously. This strategy features mild reaction conditions, good substrate compatibility, excellent regioselectivity. The products obtained have the potential for further conversion other valuable compounds. Initial investigations mechanism suggest that it may proceed via a radical pathway. Notably, SOgen was proven as uniquely effective surrogate in this transformation.

Language: Английский

Citations

17

Generation of Sulfamoyl Radical for the Modular Synthesis of Sulfonamides DOI

Haiping Lv,

Xinzhou Chen, Xuemei Zhang

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(9), P. 6513 - 6524

Published: April 13, 2024

Efficient synthesis of sulfonamides has long been pursued by chemists due to their frequent occurrence in pharmaceuticals, especially anti-inflammatory medicines. The traditional assembly from sulfonyl chlorides and amines, as well the recently developed one-step involving sulfur dioxide, still faces challenges such poor substrate compatibility and/or stringent reaction conditions. Herein, we present a strategy for situ generation sulfamoyl radicals modular both alkenyl alkyl with wide applicability (>100 examples), mild conditions, easily accessible starting materials. This method is successfully applied late-stage modification drug molecules (23 molecule naratriptan, 15N-labeling sulfonamides.

Language: Английский

Citations

6

Ni-Catalyzed Hydrosulfonylation of Alkenes with Aromatic Iodides and K2S2O5 DOI
Jun Zhang,

Hui-Ling Ma,

Chenxi Yang

et al.

Organic Letters, Journal Year: 2023, Volume and Issue: 25(44), P. 8043 - 8047

Published: Oct. 30, 2023

Hydrosulfonylation of alkenes with readily available aromatic iodides via a SO2-insetion strategy is presented. The combination non-noble Ni catalysis (iPr)3SiH as the final reductant enables efficient formation aryl and heteroaryl sulfinate intermediates, which undergo Michael-type additions to electron-deficient for initiating hydrosulfonylation process. Moreover, superiority this protocol demonstrated by broad substrate scope good functional group compatibility.

Language: Английский

Citations

12

Access to chiral β-amino sulfones from acrylamides and sulfur dioxide by iron catalysis DOI
Liping Luo, Xuemei Zhang,

Chunxi Huang

et al.

Organic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(6), P. 1678 - 1684

Published: Jan. 1, 2024

This method allows for the enantioselective synthesis of β-azide sulfones via iron-catalyzed vicinal azide-sulfonylation acrylamides. It makes first instance achieving asymmetric construction through iron catalysis with SO 2 insertion.

Language: Английский

Citations

5

Oxidant-Assisted Sulfonylation/Cyclization Cascade Synthesis of Alkylsulfonylated Oxindoles via the Insertion of SO2 DOI
Long‐Jin Zhong, Hui Chen, Xuan Shang

et al.

The Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: 89(8), P. 5409 - 5422

Published: April 2, 2024

An oxidant-assisted tandem sulfonylation/cyclization of electron-deficient alkenes with 4-alkyl-substituted Hantzsch esters and Na2S2O5 for the preparation 3-alkylsulfonylated oxindoles under mild conditions in absence a photocatalyst transition metal catalyst is established. The mechanism studies show that alkyl radicals, which come from cleavage C–C bond 4-substituted oxidant conditions, subsequently undergo situ insertion sulfur dioxide to generate crucial alkylsulfonyl radical intermediates. This three-component reaction provides an efficient facile route construction alkylsulfonylated avoids use highly toxic chlorides or hydrazines as sources.

Language: Английский

Citations

5

C–H Bond Sulfonylation from Thianthrenium Salts and DABCO·(SO2)2: Synthesis of 2-Sulfonylindoles DOI

Chen Guo,

Xinhua Wang, Qiuping Ding

et al.

The Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: 89(13), P. 9672 - 9680

Published: June 13, 2024

A three-component reaction of 1-(1H-indol-1-yl)isoquinolines or 1-(pyridin-2-yl)-1H-indoles, DABCO·(SO2)2, and thianthrenium salts under synergistic photoredox palladium catalysis is accomplished. This direct C–H bond sulfonylation indoles with the insertion sulfur dioxide mild conditions works efficiently, giving rise to a wide range 2-sulfonated in moderate good yields conditions. In this protocol, generality aryl/alkyl demonstrated as well. radical process combined proposed.

Language: Английский

Citations

5