2459-10-1Relevant articles and documents
Domino retro Diels-Alder/Diels-Alder reaction: An efficient protocol for the synthesis of highly functionalized bicyclo[2.2.2]octenones and bicyclo[2.2.2]octadienones
Chittimalla, Santhosh Kumar,Shiao, Hui-Yi,Liao, Chun-Chen
, p. 2267 - 2277 (2006)
A novel and convenient approach, the domino retro Diels-Alder/Diels-Alder reaction sequence for highly stereo- and regioselective synthesis of various bicyclo[2.2.2]octenone and bicyclo[2.2.2]octadienone derivatives is presented. Thus, the masked o-benzoquinones (MOBs) 2a-e generated by the pyrolysis of the respective dimers 3a-e participated in this novel synthetic strategy with a variety of olefinic and acetylenic dienophiles at 220 °C to provide the title compounds in good to excellent yields. The Royal Society of Chemistry 2006.
H-BPin/KOtBu Promoted Activation of Cobalt Salt to a Heterotopic Catalyst for Highly Selective Cyclotrimerization of Alkynes
Song, Shuo,Li, Chuhan,Liu, Tianfen,Zhang, Panke,Wang, Xiaoming
supporting information, p. 6925 - 6930 (2021/09/14)
A mixture of HBPin with KOtBu was found to activate cobalt salt to form a heterotopic cobalt species that is highly active for catalytic intermolecular trimerization of alkynes. This protocol affords 1,2,4-regioisomers in good yields with high regioselectivities under mild conditions. These salient features, together with the operational simplicity and high efficiency, as well as obviating the use of any costly and/or air sensitive ligands, renders the protocol promising for practical applications.
Sustainable synthesis of 1,2,3,4-cyclohexanetetracarboxylate from sugar-derived carboxylic acids
Jiang, Huifang,Lu, Fang,Lu, Rui,Luo, Xiaolin,Si, Xiaoqin,Xu, Jie
supporting information, p. 7499 - 7502 (2020/07/15)
Herein, we report a sustainable route for the synthesis of 1,2,3,4-cyclohexanetetracarboxylate from sugar-derived muconic acid and fumaric acid. The key Diels-Alder reaction constructed a cyclohexene framework substituted by four ester groups. The isolated yield of tetramethyl 5-cyclohexene-1,2,3,4-tetracarboxylate was up to 95.5percent without any catalyst used. And the hydrogenation reaction of the cycloadduct was catalyzed by commercial RANEY? Ni at room temperature and nearly 100percent yield of the cyclohexyl target products was obtained. This journal is
METHOD FOR PRODUCING BENZENE COMPOUND AND CATALYST FOR PRODUCING BENZENE COMPOUND
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Paragraph 0028, (2019/03/02)
PROBLEM TO BE SOLVED: To provide a method for producing a benzene compound capable of performing production of various benzene compounds with low environmental load without generating waste as in the case of using benzene as a starting raw material and to provide a catalyst used for the production method. SOLUTION: There are provided: a method for producing a benzene compound from alkynes in the presence of a catalyst, wherein the catalyst is a PdAu supported catalyst obtained by supporting Pd and Au in a molar ratio of 1:1 to 1:10 on a carrier; and a catalyst used for the production method. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT