36229-70-6Relevant academic research and scientific papers
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.
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.
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.
