Synthesis and SAR of 2-phenyl-1-sulfonylaminocyclopropane carboxylates as ADAMTS-5 (Aggrecanase-2) inhibitors
摘要:
A series of 1-sulfonylaminocyclopropanecarboxylates was synthesized as ADAMTS-5 (Aggrecanase-2) inhibitors. After an intensive investigation of the central cyclopropane core including its absolute stereochemistry and substituents, we found compound 22 with an Agg-2 IC(50) = 7.4 nM, the most potent ADAMTS-5 inhibitor reported so far. (c) 2009 Elsevier Ltd. All rights reserved.
Oxidative Addition of Haloheteroarenes to Palladium(0): Concerted versus S<sub>N</sub>Ar-Type Mechanism
作者:Bert U. W. Maes、Stefan Verbeeck、Tom Verhelst、Audrey Ekomié、Niklas von Wolff、Guillaume Lefèvre、Emily A. Mitchell、Anny Jutand
DOI:10.1002/chem.201406210
日期:2015.5.18
The kinetics of the oxidative additions of haloheteroarenes HetX (X=I, Br, Cl) to [Pd0(PPh3)2] (generated from [Pd0(PPh3)4]) have been investigated in THF and DMF and the rate constants have been determined. In contrast to the generally accepted concerted mechanism, Hammett plots obtained for substituted 2‐halopyridines and solvent effects reveal a reactionmechanism dependent on the halide X of HetX:
Synthesis of Decahydrocyclobuta[
<i>cd</i>
]indene Skeletons: Rhodium(III)‐Catalyzed Hydroarylation and Relay Thiophene‐Promoted Intramolecular [2+2] Cycloaddition
作者:Dingding Gao、Feng Wang、Xing‐Yu Liu、Kai‐Rui Feng、Jia‐Ying Zhao、Yu‐Hui Wang、Xiao‐Di Yang、Ping Tian、Guo‐Qiang Lin
DOI:10.1002/adsc.202000825
日期:2020.10.21
The preparation of decahydrocyclobuta[cd]indene skeleton was accomplished through rhodium(III)‐catalyzed hydroarylation and relay thiophene‐promoted intramolecular [2+2] cycloaddition. This tandemreaction exhibited broad substrate scope (24 examples) and good functional group compatibility. Control experiments revealed the important role of sulfur (S) heteroatom, thus a tentative mechanism with thiophene‐promoted
十氢环丁[ cd ]茚骨架的制备是通过铑(III)催化的氢芳基化反应和噻吩促进的分子内[2 + 2]环加成反应完成的。该串联反应表现出广泛的底物范围(24个实施例)和良好的官能团相容性。对照实验揭示了硫(S)杂原子的重要作用,因此提出了一种由噻吩促进的双迈克尔加成的尝试性机理来解释这种正式的[2 + 2]环加成。此外,所得的多环产物对乳腺癌细胞系MDA-MB-468表现出有效的抗癌活性。
Disclosed are compounds of Formula 1, including all stereoisomers, N oxides, and salts thereof, A is a radical selected from the group consisting of, and B1, B2, B3, T, R1, R2 R3, R4, R5, R6, R7, R8, R9, R10, R11, R12 and R13 are as defined in the disclosure. Also disclosed are compositions containing the compounds of Formula 1 and methods for controlling undesired vegetation comprising contacting the undesired vegetation or its environment with an effective amount of a compound or a composition of the invention.
The development of a rational protocol to realize the complete regioselectivity and the capability to switch regioselectivity is an appealing yet challenging task. Herein, a regiodivergent C−H arylation of 2-pyridylthiophenes has been demonstrated via the choice of RuII and PdII catalysts. The reactions proceeded smoothly in a good regioselective manner to afford the corresponding C3- and C5-arylated
2-pyridylthiophenes with alkenes is realized. The alkenylation reactions proceeded smoothly in a highly regio- and stereo-selective manner to afford a broad range of C3- and C5-alkenylated products. Depending on the catalyst employed, the reactions involve two typical approaches: C3-alkenylation via chelation-assisted rhodation and C5-alkenylation via electrophilic palladation. This regiodivergent synthetic protocol