84459-32-5Relevant articles and documents
Gold-Catalyzed Cyclization of 2-Alkynylaldehyde Cyclic Acetals via Hydride Shift for the Synthesis of Indenone Derivatives
Yamada, Tsuyoshi,Park, Kwihwan,Tachikawa, Takumu,Fujii, Akiko,Rudolph, Matthias,Hashmi, A. Stephen K.,Sajiki, Hironao
supporting information, p. 1883 - 1888 (2020/03/03)
An efficient gold-catalyzed cyclization of 2-alkynylaldehyde cyclic acetals has been developed for the synthesis of indenone derivatives. A wide variety of functionalized indenone derivatives can be obtained in good-to-excellent yields. HMBC and NOESY NMR analyses and mechanistic elucidation experiments revealed that the cyclization occurs via a 1,5-H shift. The cyclic acetal group promoted the 1,5-H shift by activating the benzylic C-H bond and preventing the migration of the alkoxy group by tethering both alkoxy groups.
Sequential Assembly of Morita-Baylis-Hillman Carbonates and Activated ortho-Vinylbenzaldehydes to Construct Chiral Methanobenzo[7]annulenone Frameworks
Jiang, Bo,Xiao, Ben-Xian,Ouyang, Qin,Liang, Hua-Ping,Du, Wei,Chen, Ying-Chun
supporting information, (2019/05/08)
The α-regioselective asymmetric [3 + 2] annulation reaction of Morita-Baylis-Hillman carbonates from isatins and activated ortho-vinylbenzaldehyses was developed by the catalysis of a chiral tertiary amine. The sequential N-heterocyclic carbene-mediated intramolecular Stetter reaction was conducted to finally furnish the bridged 5,8-methanobenzo[7]annulen-9-one architectures incorporating a spirooxindole motif with excellent stereoselectivity.
Method for preparing 3,5-disubstituted oxadiazole compound
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Paragraph 0024-0026, (2019/04/30)
The invention discloses a method for preparing a 3,5-disubstituted oxadiazole compound N-((3-(2-bromo-5-nitrophenyl)-1,2,4-oxadiazole-5-yl)methyl)ethylamine. 4-nitrobromobenzene used as a starting material undergoes hydroformylation, oximation, eliminatio