949028-82-4Relevant academic research and scientific papers
Catalyst-dependent divergent synthesis of pyrroles from 3-alkynyl imine derivatives: A noncarbonylative and carbonylative approach
Chen, Gen-Qiang,Zhang, Xiao-Nan,Wei, Yin,Tang, Xiang-Ying,Shi, Min
, p. 8492 - 8497 (2014/08/18)
A novel Ru0- and RhI-catalyzed noncarbonylative and carbonylative cycloisomerization of readily available 3-alkynyl imine derivatives has been developed to provide 3,4-fused or nonfused pyrrole derivatives efficiently in moderate to
Gold-catalyzed hydrative carbocyclization of 1,5- and 1,6-diyn-3-ones via an oxygen transfer process
Tang, Jhih-Meng,Liu, Ting-An,Liu, Rai-Shung
supporting information; experimental part, p. 8479 - 8483 (2009/04/04)
(Chemical Equation Presented) This study reports new hydrative carbocyclizations of 1,5- and 1,6-diyn-3-ones catalyzed by PPh3AuOTf, involving a π-alkyne-assisted oxygen transfer in the reaction mechanisms. Treatment of 2-(alk-2-yn-1-onyl)-1-alkynylbenzenes with PPh3AuOTf (5 mol %) in wet 1,4-dioxane (23°C, 10 min) led to hydrative aromatization to give 4-hydroxyl-1-naphthyl ketones efficiently. This approach is also extendible to the hydrative cyclization of acyclic 1,5-diyn-3-ones, which afforded 4-cyclopentenonyl ketones in reasonable yields. On the basis of this oxygen-labeling study, we propose a plausible mechanism involving an alkyne-assisted oxygen transfer to generate key oxonium and gold-enolate intermediates.
Gold-catalyzed synthesis of bicyclo[4.3.0]nonadiene derivatives via tandem 6-endo-dig/Nazarov cyclization of 1,6-allenynes
Lin, Guan-You,Yang, Chun-Yao,Liu, Rai-Shung
, p. 6753 - 6757 (2008/02/10)
(Chemical Equation Presented) Catalytic cyclization of 1,6-allenynes was achieved by AuPPh3SbF6 (5 mol %) in cold CH 2Cl2 (0°C, 0.5-4 h) to form bicyclo[4.3.0]nonadiene products; this cyclization proceeded more
