证明了由2-芳基吡啶和两当量的铑催化的电子等效的缺电子烯烃可高度区域选择性地合成吡啶并[ 2,1- a ]异吲哚盐。使用廉价的氧气作为氧化剂,在110℃的水性介质中进行反应。当用碱处理该盐以得到β-二取代的烯烃产物时,就会发生异吲哚鎓盐的反向氮杂-迈克尔加成反应。提出了一种反应机理,涉及烯烃与2-芳基吡啶的邻位C H烯化反应,分子内氮杂迈克尔基加成反应,烯烃片段β碳上的去质子化反应,然后另一种迈克尔加成反应生成最终产物。
Catalyst-controlled mono- and diolefinations of arenes via C–H activation in water with reaction times of tens of minutes.
芳烃的催化控制的单烯烃化和双烯烃化,通过水中的C-H活化,在数十分钟内完成反应。
METHOD OF PRODUCING AROMATIC COMPOUND
申请人:Kakiuchi Fumitoshi
公开号:US20090043096A1
公开(公告)日:2009-02-12
A method of producing an aromatic compound of the following formula (3) comprising reacting a compound of the following formula (1) with an olefin compound of the following formula (2) in the presence of a transition metal complex:
(wherein, an Ar
1
ring represents an aromatic hydrocarbon ring or aromatic heterocyclic ring, an Ar
2
ring represents a heterocyclic ring containing X
1
and N*, and the X
1
represents a nitrogen atom or carbon atom and the N represents a nitrogen atom connecting via a double bond to either one of two adjacent atoms in the Ar
2
ring.)
(wherein, R
1
, R
2
, R
3
and R
4
represent each independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 18 carbon atoms.)
(wherein, Ar
1
, Ar
2
, X
1
, N*, R
1
, R
2
and R
3
represent the same meanings as described above.).
Acetic Acid-Promoted Rhodium(III)-Catalyzed Hydroarylation of Terminal Alkynes
作者:Chang-Lin Duan、Xing-Yu Liu、Yun-Xuan Tan、Rui Ding、Shiping Yang、Ping Tian、Guo-Qiang Lin
DOI:10.1055/s-0037-1611780
日期:2019.5
Rhodium(III)-catalyzed hydroarylation of terminal alkynes has not previously been achieved because of the inevitable oligomerization and other side reactions. Here, we report a novel Cp*Rh(III)-catalyzed hydroarylation of terminal alkynes in acetic acid as solvent to facilitate the C–H bond activation and subsequent transformations. This reaction proceeds under mild conditions, providing an effective
Mechanistic Insight into Catalytic Redox-Neutral C–H Bond Activation Involving Manganese(I) Carbonyls: Catalyst Activation, Turnover, and Deactivation Pathways Reveal an Intricate Network of Steps
作者:L. Anders Hammarback、Alan Robinson、Jason M. Lynam、Ian J. S. Fairlamb
DOI:10.1021/jacs.8b09095
日期:2019.2.13
responsible for providing a source of protons in the protonation of vinyl-manganese(I) carbonyl intermediates. In this study, using a combination of experimental and theoretical methods, we provide comprehensive answers to the key mechanistic questions concerning the Mn(I) carbonyl-catalyzed C-H bond functionalization of 2-phenylpyridine and relatedcompounds. Our results enable the explanation of
Rhodium-Catalyzed Decarbonylative Direct Olefination of Arenes with Vinyl Carboxylic Acids
作者:Ruiying Qiu、Lingjuan Zhang、Conghui Xu、Yixiao Pan、Hongze Pang、Lijin Xu、Huanrong Li
DOI:10.1002/adsc.201401020
日期:2015.4.13
A rhodium(I)‐catalyzed direct CH bond olefination of pyridyl‐substituted arenes with readily available vinyl carboxylic acids has been realized. This reaction occurred efficiently without the need for any external oxidant, affording the ortho‐olefinated products in high yields and excellent regioselectivities. Diversely substituted vinyl carboxylic acids behaved as efficient olefination reagents under