Trans-selective carboxylative cyclization of 1,6-dienes using the CO2 radical anion DOI

Yan Song,

Hiroki Hayashi, Saeesh R. Mangaonkar

и другие.

Chemistry Letters, Год журнала: 2024, Номер 53(8)

Опубликована: Июль 26, 2024

Abstract The reactivity of the carbon dioxide radical anion (CO2•−) toward alkenes has garnered remarkable attention owing to its potential synthesize valuable organic compounds. Herein, we report reactions between CO2•− and 1,6-dienes, yielding 5-membered lactam derivatives via highly trans-selective 5-exo-trig cyclization. Both carboxylative cyclization hydrocyclization occur with up 74% combined yield. Computational studies show that transition state during favors trans-configuration over cis-configuration. This work offers new insights into synthesis N-heterocycles.

Язык: Английский

Visible-light-driven alkene dicarboxylation with formate and CO2 under mild conditions DOI Creative Commons
Fulin Zhang, Xiaoyang Wu, Panpan Gao

и другие.

Chemical Science, Год журнала: 2024, Номер 15(16), С. 6178 - 6183

Опубликована: Янв. 1, 2024

Low-cost formate salt was used as the reductant and part of carboxyl source in a visible-light-driven dicarboxylation diverse alkenes, including simple styrenes. The highly competing hydrocarboxylation side reaction successfully overridden. Good yields products were obtained under mild conditions at ambient temperature pressure CO

Язык: Английский

Процитировано

15

Gd(III)-Catalyzed Regio-, Diastereo-, and Enantioselective [4 + 2] Photocycloaddition of Naphthalene Derivatives DOI
Muzi Li,

Xu‐Lun Huang,

Zuo‐Yu Zhang

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(25), С. 16982 - 16989

Опубликована: Июнь 13, 2024

Catalytic asymmetric dearomatization (CADA) reactions have evolved into an efficient strategy for accessing chiral polycyclic and spirocyclic scaffolds from readily available planar aromatics. Despite the significant developments, CADA reaction of naphthalenes remains underdeveloped. Herein, we report a Gd(III)-catalyzed naphthalene with PyBox ligand via visible-light-enabled [4 + 2] cycloaddition. This features application Gd/PyBox complex, which regulates reactivity selectivity simultaneously, in excited-state catalysis. A wide range functional groups is compatible this protocol, giving highly enantioenriched bridged polycycles excellent yields (up to 96%) >20:1 chemoselectivity, dr, >99% ee). The synthetic utility demonstrated by 2 mmol scale reaction, removal directing group, diversifications products. Preliminary mechanistic experiments are performed elucidate mechanism.

Язык: Английский

Процитировано

12

Photocatalytic Reductive Functionalization of Aryl Alkynes via Alkyne Radical Anions DOI
Xiaogang Tong, Zugen Wu, Hwee Ting Ang

и другие.

ACS Catalysis, Год журнала: 2024, Номер 14(12), С. 9283 - 9293

Опубликована: Июнь 4, 2024

The direct reductive functionalization of alkynes under mild conditions presents a promising yet challenging avenue for accessing value-added molecules. Alkyne radical anions represent distinct class reactive intermediates characterized by both charge and an unpaired electron, thus holding great potential facilitating diverse bond formations, particularly in alkyne functionalization. However, the synthetic utility is limited, primarily due to difficulty their generation formation highly unstable vinyl intermediates. In this study, we accomplished from aryl feedstocks via single electron transfer (SET) reduction with photogenerated CO2 anion (CO2•–), enabling hydroalkylation, arylalkenylation, hydrocarboxylation alkynes. Our photocatalytic strategy features metal-free catalysis, reaction conditions, employment traceless reductant, good functional group compatibility, step- atom-economy, high regioselectivity. This study not only paves way leveraging underexplored but also catalyzes ongoing exploration bifunctional CO2•– species chemistry.

Язык: Английский

Процитировано

11

Arenethiolate-Catalyzed 1,5-HAT of Aryl Halides: Synthesis of γ-Spirolactams DOI
Wei Xiao,

Shengyun Liu,

Yuhui Lin

и другие.

Organic Letters, Год журнала: 2024, Номер 26(15), С. 3081 - 3085

Опубликована: Апрель 3, 2024

γ-Spirolactam is a privileged building block that found in wide range of natural products and bioactive compounds. Herein, we report an arenethiolate-catalyzed 1,5-HAT aryl halides to obtain γ-spirolactams through SET reduction/intramolecular 1,5-HAT/cyclization/HAT process. This protocol features metal-free conditions broad substrate scope, furnishing the moderate excellent yields. Notably, bromides, chlorides even fluorides are well tolerated this transformation. A mechanism involving arenethiolate as catalyst proposed based on DFT calculation.

Язык: Английский

Процитировано

7

Photocatalytic deuterocarboxylation of alkynes with oxalate DOI Creative Commons

Pei Xu,

Hao-Qiang Jiang,

Hui Xu

и другие.

Chemical Science, Год журнала: 2024, Номер 15(32), С. 13041 - 13048

Опубликована: Янв. 1, 2024

Herein, a catalytic photoredox-neutral strategy for alkyne deuterocarboxylation with tetrabutylammonium oxalate as the carbonyl source and D

Язык: Английский

Процитировано

6

Photoredox-Neutral Deoxygenative Carboxylation of Acylated Alcohols with Tetrabutylammonium Oxalate DOI

Chen-Wei Xu,

Si-Yi Yan,

Hui Xu

и другие.

ACS Catalysis, Год журнала: 2024, Номер 14(16), С. 11967 - 11973

Опубликована: Июль 26, 2024

Herein, a photoredox-neutral strategy for carboxylation of acylated alcohols via C(sp3)–O bond activation and cleavage with tetrabutylammonium oxalate (TBAO) as the carbonyl source reductant well promoter is described. Neither pre-established CO2 atmosphere nor external electron donors are required TBAO crucial transformation. Various primary, secondary, tertiary could be smoothly converted to corresponding aryl acetic acids, which core structures diverse pharmaceutical drugs.

Язык: Английский

Процитировано

5

Formate Salts: The Rediscovery of Their Radical Reaction under Light Irradiation Opens New Avenues in Organic Synthesis DOI

Qing Shen,

Kun Cao,

Xiaoqing Wen

и другие.

Advanced Synthesis & Catalysis, Год журнала: 2024, Номер 366(21), С. 4274 - 4293

Опубликована: Авг. 17, 2024

Abstract Formates are abundantly available and inexpensive commodity chemical, widely used in laboratory industrial organic synthesis. promising hydrogen carrier green C1 source, have also been a subject of research as SET reductants recent years. Compared to the toxic flammable gas carbon monoxide, which serves formates easier handle, store, transport, more environmentally friendly. Therefore, studies radical reactions, formate is not only an ideal source carbonyl, great significance synthesize carboxyl compounds with various structures, but reductant for editing molecules either scientific or production. The activation conversion formate, reductant, very challenging hot field

Язык: Английский

Процитировано

5

Single electron reduction of NHC–CO2–borane compounds DOI Creative Commons
Agustín Morales, Caroline Gonçalves, Alix Sournia‐Saquet

и другие.

Chemical Science, Год журнала: 2024, Номер 15(9), С. 3165 - 3173

Опубликована: Янв. 1, 2024

NHC–CO 2 –borane compounds were shown to be reduced by one electron at a reduction potential as mild −1.34 V vs. Fc +/0 . The resulting radical anion was crystallographically characterised and showed reactivity similar that of the CO anion.

Язык: Английский

Процитировано

4

Visible-Light-Promoted Cascade Carboxylation/Arylation of Unactivated Alkenes with CO2 for the Synthesis of Carboxylated Indole-Fused Heterocycles DOI

Yang Han,

Qi Yang,

Yang Yao

и другие.

Organic Letters, Год журнала: 2024, Номер 26(30), С. 6341 - 6346

Опубликована: Июль 18, 2024

Described here is a visible-light-promoted cascade carboxylation/arylation of indole-tethered unactivated alkenes with CO

Язык: Английский

Процитировано

4

1‐Methylpyridine‐2(1H)‐thione Photocatalyzed Giese Reaction with N‐Hydroxyphthalimide Esters via Single Electron Transfer DOI Open Access

Lanting Li,

Yuzhuo Wang, Li Yuan

и другие.

Chinese Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 18, 2025

Comprehensive Summary We have developed a series of 1‐methylpyridine‐2(1 H )‐thione (MPT) analogues to be used as organocatalysts. The MPT catalysts are easily prepared and bench‐stable. In our previous work, we found that the ground‐state catalyst could act nucleophile generate primary radicals via an S N 2 pathway. However, this reaction was limited benzyl radicals. Herein, reported new catalytic property catalyst. photoexcited ( E (MPT ·+ /MPT*) = –1.60 V vs. Ag/AgCl in MeCN) reduce NHPI esters through single electron transfer process. Various carbon radicals, including radical, well primary, secondary tertiary alkyl generated easily. Notably, amino acids, peptide, pharmaceuticals, other biologically active molecules modified by using methodology showing potential synthetic utility method.

Язык: Английский

Процитировано

0