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Synthesis of δ-Bromo γ,δ-Unsaturated Carbonyl Compounds via Palladium-Catalyzed Bromoalkylation of Alkynoates
被引:37
作者:
Wen, Yanmei
[1
,2
]
Huang, Liangbin
[1
]
Jiang, Huanfeng
[1
]
Chen, Huoji
[1
]
机构:
[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China
基金:
中国国家自然科学基金;
关键词:
BETA-HETEROATOM ELIMINATION;
ALLYL ALCOHOLS;
RECONSTITUTIVE CONDENSATION;
(Z)-4'-ACETOXY-2'-BUTENYL 2-ALKYNOATES;
PALLADIUM(II)-CATALYZED CYCLIZATION;
PROPARGYL ALCOHOLS;
MOLECULAR-OXYGEN;
BOND FORMATION;
AQUEOUS-MEDIA;
ALKYNES;
D O I:
10.1021/jo202416h
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
Palladium-catalyzed regio- and stereoselective intermolecular tandem reaction of electron-deficient alkynes, CuBr2, and allylic alcohol to synthesize delta-bromo-gamma,delta-unsaturated carbonyls was developed. A mechanism involving bromopalladation of alkyne, followed by insertion of allylic alcohol and allylic hydrogen shift, is proposed. The shift of allylic hydrogen is the rate-limiting step in this reaction.
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页码:2029 / 2034
页数:6
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