36229-69-3Relevant articles and documents
1,3-Dialkynyl- and 1,3-dialkenylisobenzofurans: New π-extended congeners prepared by double nucleophilic addition of alkynyllithiums to o-phthalaldehyde
Kudo, Ryoji,Kitamura, Kei,Hamura, Toshiyuki
supporting information, p. 25 - 28 (2017/02/10)
Efficient synthetic route to 1,3-dialkynyl- and 1,3-dialkenylisobenzofurans, new π-extended congeners of isobenzofurans, was reported. A three-step protocol including double nucleophilic additions of alkynyllithiums to o-phthalaldehyde and selective oxida
PBr3-mediated cyclization of 1,7-diyn-3,6-bis(propargyl carbonate)s: Synthesis of 5-bromotetracenes
Sun, Ning,Chen, Haoyi,Li, Xiangdong,Xu, Murong,Gan, Yi,Zhang, Liangwei,Liu, Yuanhong
, p. 10051 - 10061 (2018/05/31)
A new and straightforward method for the synthesis of 5-bromotetracenes through PBr3-mediated cyclization of 1,7- diyn-3,6-bis(propargyl carbonate)s has been developed. This method offers several advantages such as easily accessible starting materials, high efficiency, and wide functional group compatibility. In addition, chloro- and iodo-substituted tetracenes were also synthesized using appropriate halogenating reagents. The utility of the 5-bromotetracene products has been illustrated by their efficient transformations through various palladium-catalyzed cross-coupling reactions.
And four bonzene and pentacene synthetic method of compound
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Paragraph 0025-0028, (2016/10/10)
The invention relates to a synthesis method of tetracene and pentacene compounds. A plurality of double-acetylene propanol carbonate compounds are prepared from simple and available phthalic dicarboxaldehyde compound and aryl acetylene by using addition reaction of an alkynyl lithium reagent. The double-acetylene propanol carbonate compounds can react with an organic boronic acid in series in the presence of a catalytic amount of palladium reagent, so as to further synthetize the tetracene and pentacene compounds at good to excellent yield. The method has the characteristics of being available in raw materials, simple to operate, mild in condition, convenient and fast, excellent in yield and the like, and aryl and alkyl can be effectively led to skeletons of tetracene and pentacene by using the method.
Gold-catalyzed cascade cycloisomerization of 1,7-diyn-3,6-bis(propargyl carbonate)s: Stereoselective synthesis of naphtho[b]cyclobutenes
Chen, Ming,Liu, Jun,Wang, Lu,Zhou, Xiaobo,Liu, Yuanhong
supporting information, p. 8650 - 8652 (2013/09/23)
Gold-catalyzed cycloisomerization of 1,7-diyn-3,6-bis(propargyl carbonate)s leads to a highly efficient and diastereoselective synthesis of functionalized naphtho[b]cyclobutenes. A cascade sequence involving gold-catalyzed double 3,3-rearrangement, 6π-electrocyclic reaction and a decarbonylative cyclization was proposed for this reaction.
Palladium-catalyzed highly efficient synthesis of tetracenes and pentacenes
Chen, Ming,Chen, Yifeng,Liu, Yuanhong
supporting information, p. 12189 - 12191 (2013/01/16)
Pd(0)-catalyzed cascade reactions of 1,7-diyn-3,6-bis(propargyl carbonate) with organoboronic acids have been developed, which provide one-pot access to functionalized tetracenes or pentacenes. The Royal Society of Chemistry 2012..
Highly efficient Bronsted acid-catalyzed cycloisomerizations of alkynes bearing bis(acetoxy) groups to indenyl ketones
Liu, Yuanhong,Zhou, Shaolin,Li, Guijie,Yan, Bin,Guo, Shenghai,Zhou, Yebing,Zhang, Hao,Wang, Peng George
supporting information; body text, p. 797 - 801 (2009/04/08)
A Bronsted acid-catalyzed cycloisomerization of functionalized alkynes is described, which is assumed to be initiated through the formation of a benzylic cation intermediate. The reaction offers a highly efficient and straightforward route to indenyl ketones with a wide range of substituents under mild conditions.
Synthesis of tetracene sulfoxide and tetracene sulfone via a cascade cyclization reaction
Lin, Yi-Chun,Lin, Chih-Hsiu
, p. 2075 - 2078 (2008/02/02)
A facile synthesis of tetracene sulfoxides and sulfones based on odiallene annulation initiated cascade cyclization was developed. The photophysical behavior of these tetracene derivatives can be generally rationalized by the presence of electron-withdraw
Catalytic [2 + 2 + 2] and thermal [4 + 2] cycloaddition of 1,2-bis(arylpropiolyl)benzenes
Tanaka, Ken,Suda, Takeshi,Noguchi, Keiichi,Hirano, Masao
, p. 2243 - 2246 (2007/10/03)
We have determined that a cationic rhodium(I)/Segphos complex catalyzes an enantio- and diastereoselective intermolecular [2 + 2 + 2] cycloaddition of 1,2-bis(arylpropiolyl)benzenes with various monoalkynes at room temperature to give axially chiral 1,4-t
A novel method for the generation of 2,3-naphthoquinodimethanes utilizing samarium(II) iodide-promoted allene synthesis
Inanaga,Sugimoto,Hanamoto
, p. 7035 - 7038 (2007/10/02)
2,3-Naphthoquinodimethanes are easily generated from o-bis(α-acetoxypropargyl)benzene derivatives with SmI2 in the presence of palladium catalyst under mild conditions. The reactions of the quinodimethane intermediates were found to follow the different paths depending on the acetylenic substituents of substrates.
