多官能化芳烃是众多生物活性天然产物和药物中不可替代的一部分。过渡金属催化的直接不对称双或多CH键官能化是非常可取的,但探索较少。在此,我们开发了一种 Rh(III) 催化的不对称 C H 烯基化环化/酰胺化反应与带有O的烯烃系链芳烃的反应,能够在一个步骤中提供多种呋喃喹唑啉酮,具有广泛的底物范围和良好的官能团耐受性。
Ruthenium-Catalyzed Hydroarylation and One-Pot Twofold Unsymmetrical C−H Functionalization of Arenes
作者:Koushik Ghosh、Raja K. Rit、E. Ramesh、Akhila K. Sahoo
DOI:10.1002/anie.201600649
日期:2016.6.27
excellent yields. A one‐pot, unsymmetrical, twofold C−H functionalization involving intramolecular C−C and intermolecular C−C/C−N bond formations is successfully demonstrated by using a single set of catalytic reaction conditions, which is unprecedented thus far. A novel isoquinolone‐bearing dihydrobenzofuran is constructed through an unsymmetrical twofold C−H functionalization.
Arylamidoalkyl-N-hydroxyurea compounds having lipoxygenase inhibitory
申请人:Abbott Laboratories
公开号:US05514702A1
公开(公告)日:1996-05-07
The present invention provides certain (substituted carbocyclic aryl)amidoalkyl- and (substituted heterocyclic aryl)amidoalkyl-N-Hydroxy urea compounds which inhibit lipoxygenase enzyme activity and are thus useful in the treatment of allergic and inflammatory disease states.
Sulfoximine-Assisted One-Pot Unsymmetrical Multiple Annulation of Arenes: A Combined Experimental and Computational Study
作者:Koushik Ghosh、Majji Shankar、Raja K. Rit、Gurudutt Dubey、Prasad V. Bharatam、Akhila K. Sahoo
DOI:10.1021/acs.joc.8b01077
日期:2018.9.7
presence of Ru catalyst forming two C–C and one C–N bonds in a single operation. The overall process is atom economical and step-efficient and provides unusual dihydrofuran-fused isoquinolone heterocycles. Further annulation of NH and the proximal o-C–H-arene of isoquinolone with alkynes build highly conjugated novel polycyclic compounds. Overall, three independent annulations in arene motifs are visualized
Rh(iii)-Catalyzed intramolecular redox-neutral cyclization of alkenes via C–H activation
作者:Zhuangzhi Shi、Mélissa Boultadakis-Arapinis、Dennis C. Koester、Frank Glorius
DOI:10.1039/c4cc00029c
日期:——
Biologically interesting fused oligocyclic lactams have been prepared via an intramolecular redox-neutral cyclization process. By the proper choice of the substrates with a wide variety of tethered olefins, the less favored CâH bond can be activated and functionalized. This CâH activation proceeds under mild conditions, obviates the need for external oxidants, and displays a broad scope with respect to the substituents.
Amide-Directed Intramolecular Co(III)-Catalyzed C–H Hydroarylation of Alkenes for the Synthesis of Dihydrobenzofurans with a Quaternary Center
作者:Asier Carral-Menoyo、Nuria Sotomayor、Esther Lete
DOI:10.1021/acs.joc.0c01413
日期:2020.8.7
example of Cp*Co(III)-catalyzed intramolecular hydroarylation of allyl aryl ethers using an amide directing group for the preparation of 3,3-disubstituted dihydrobenzofurans in high yields is described. The reaction of the unactivated alkene is completely selective for the formation of the quaternary center, allowing different substitution patterns on the aromatic ring and the alkene. The cyclization