Dual Cobalt and Photoredox Catalysis Enabled Redox-Neutral Annulation of 2-Propynolphenols

被引：21

作者：

Zhu, Yao ^{[1
]}

He, Yong-Qin ^{[2
]}

Tian, Wan-Fa ^{[1
]}

Wang, Mei ^{[1
]}

Zhou, Zhao-Zhao ^{[3
]}

Song, Xian-Rong ^{[1
]}

Ding, Hai-Xin ^{[1
]}

Xiao, Qiang ^{[1
]}

机构：

[1] Jiangxi Sci & Technol Normal Univ, Inst Organ Chem, Key Lab Organ Chem, Nanchang 330013, Jiangxi, Peoples R China

[2] Nanchang Univ, Sch Pharmaceut Sci, Nanchang 330006, Jiangxi, Peoples R China

[3] Nanchang Normal Univ, Dept Chem, Nanchang, Jiangxi, Peoples R China

来源：

ADVANCED SYNTHESIS & CATALYSIS | 2021年 / 363卷 / 13期

基金：

中国国家自然科学基金;

关键词：

Photoredox catalysis; cobalt; hydrogen atom transfer (HAT); redox-neutral; 2-propynolphenols; BIOACTIVE BENZOFURAN DERIVATIVES; UNACTIVATED OLEFINS; ALKENES; HYDROAMINATION; CYCLIZATION; FE; CO; HYDROALKOXYLATION; HYDROGENATION; HETEROCYCLES;

D O I：

10.1002/adsc.202100221

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A hydroxyl-assisted, organophotoredox/cobalt dual catalyzed annulation of 2-propynolphenols to form 2-hydroxymethyl-benzo[b]furans was developed by employing 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) as photosensitizer and CoCl2(PPh3)(2)/5,5 '-dimethyl-2,2 '-bipyridine as cobalt catalytic precursor. Various substrates and functional groups were tolerated. The practical applications of this reaction were further demonstrated by enlarged gram-scale and various derivations for complex heterocycles. Primary mechanistic studies suggested the involvement of cobalt-hydride mediated hydrogen atom transfer (HAT) process.

引用

页码：3372 / 3377

页数：6

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