Scope of the Reactions of Indolyl- and Pyrrolyl-Tethered <i>N</i>-Sulfonyl-1,2,3-triazoles: Rhodium(II)-Catalyzed Synthesis of Indole- and Pyrrole-Fused Polycyclic Compounds
作者:Liangbing Fu、Huw M. L. Davies
DOI:10.1021/acs.orglett.7b00180
日期:2017.4.7
An efficient synthesis of tetrahydrocarboline-type products and polycyclic spiroindolines has been achieved. The transformation proceeds via rhodium(II)-catalyzed intramolecular annulations of indolyl- and pyrrolyl-tethered N-sulfonyl-1,2,3-triazoles. The reaction could be tuned toward either the formal [3 + 2] cycloaddition or the C–H functionalization reaction depending on the electronic and structural
Rhodium(II)‐Catalyzed Intramolecular Annulation of 1‐Sulfonyl‐1,2,3‐Triazoles with Pyrrole and Indole Rings: Facile Synthesis of N‐Bridgehead Azepine Skeletons
作者:Jin‐Ming Yang、Cheng‐Zhi Zhu、Xiang‐Ying Tang、Min Shi
DOI:10.1002/anie.201400881
日期:2014.5.12
method has been developed to construct highly functionalized N‐bridgeheadazepineskeletons, which are of great importance in biological and pharmaceutical industry. The reaction proceeds through a rhodium(II) azavinyl carbene intermediate, which initiated the intramolecular CH functionalization with pyrrolyl and indolyl rings. A variety of azepine derivatives were obtained in moderate to good yields under
Ruthenium Carbene-Mediated Construction of Strained Allenes via the Enyne Cross-Metathesis/Cyclopropanation of 1,6-Enynes
作者:Ming Gao、Qiangqiang Gao、Xiangbin Hao、Ying Wu、Qingmin Zhang、Guohua Liu、Rui Liu
DOI:10.1021/acs.orglett.9b04662
日期:2020.2.7
Herein, we report on the unprecedenteddimerization of 1,6-enynes using a commercially available ruthenium complex RuCl2(PPh3)3, which results in a series of bicyclo[3.1.0]hexyl allene derivatives in moderate to excellent yields. Mechanistic investigation indicates that the in-situ-generated ruthenium vinylidene undergoes a site-selective metathesis process to provide allenyl ruthenium carbene, which
Design, synthesis, biological evaluation and molecular docking of amide and sulfamide derivatives as Escherichia coli pyruvate dehydrogenase complex E1 inhibitors
evaluated. Most of these compounds exhibit good inhibitory activity against E. coli PHDc E1 (IC50 1.99 to 25.66 μM) and obvious antibacterialactivity. 5a, 5c and 9i showed 90–100% antibacterialactivity against Xanthomonas oryzae pv. oryzae (Xoo), Acidovorax avenae subsp. avenae (Aaa) and cyanobacteria. Sulfamide derivatives 9 showed more potent inhibitory activity against E. coli PDHc E1 (IC50 < 14
Alternating Cascade Metathesis Polymerization of Enynes and Cyclic Enol Ethers with Active Ruthenium Fischer Carbenes
作者:Xuelin Sui、Tianqi Zhang、Alec B. Pabarue、Liangbing Fu、Will R. Gutekunst
DOI:10.1021/jacs.0c06045
日期:2020.7.29
been demonstrated as active species in metathesisreactions and are frequently regarded as inert. Herein, we highlight the ability of these Fischer-type carbenes to participate in cascade alternating ring-opening metathesis polymerization (AROMP) through their efficient alkyne addition reactions. When enyne monomers are combined with low-strain cyclic vinyl ethers, a living chain-growth copolymerization