首次研究了一些新的吡唑啉衍生物对两种人胞质碳酸酐酶 (hCA; EC 4.2.1.1) 同工酶 I 和 II 的抑制作用。新合成的吡唑啉衍生物的结构通过傅里叶变换红外光谱、1H-/13C-核磁共振、质谱和元素分析进行表征。化合物 1-6 对 hCA I 的 Ki 值在 16.4-205.9 nM 的范围内,对 hCA II 的 Ki 值在 6.08-93.21 nM 的范围内。这些含羟基和氨基的化合物通常是竞争性抑制剂。这里研究的化合物显示出有效的 hCA I 和 II 抑制作用,与临床使用的乙酰唑胺范围相同,并且可能用作产生酶抑制剂的先导物,
Chiral Phosphoric Acid Catalyzed Asymmetric Synthesis of 2-Substituted 2,3-Dihydro-4-quinolones by a Protecting-Group-Free Approach
作者:Kodai Saito、Yuka Moriya、Takahiko Akiyama
DOI:10.1021/acs.orglett.5b01654
日期:2015.7.2
Chiral 2-substituted 2,3-dihydro-4-quinolones were synthesized based on the chiral phosphoric acid catalyzed intramolecular aza-Michael addition reaction using N-unprotected 2-aminophenyl vinyl ketones as substrates in good yields with high enantioselectivities.
A copper-catalyzed [4+1] cycloannulation of 2-aminochalcones with ethyl 2-diazo-2-phenylacetates, along with migration of the ester group, has been developed in this study, providing a simple and effective method for the synthesis of various indole heterocyclic compounds. This strategy displayed a wide range of substrates and good tolerance of functional groups. Mechanistic studies show that the reaction
Copper(II)-Catalyzed Synthesis of Pyrrolo[3,4-<i>b</i>]quinolinediones from <i>o</i>-Amino Carbonyl Compounds and Maleimides
作者:Dhananjay S. Nipate、Krishnan Rangan、Anil Kumar
DOI:10.1021/acs.orglett.3c00240
日期:2023.3.3
A copper(II)-catalyzed cascade synthesis of 1H-pyrrolo[3,4-b]quinoline-1,3(2H)-diones has been achieved from readily available o-amino carbonyl compounds and maleimides. This one-potcascade strategy involves a copper-catalyzed aza-Michael addition followed by condensation and oxidation to deliver the target molecules. The protocol features a broad substrate scope and excellent functional group tolerance
铜 (II) 催化的 1 H-吡咯并 [3,4- b ] 喹啉-1,3(2 H )-二酮的级联合成已经从容易获得的邻氨基羰基化合物和马来酰亚胺中实现。这种单锅级联策略涉及铜催化的氮杂-迈克尔加成,然后进行缩合和氧化以传递目标分子。该协议具有广泛的底物范围和出色的官能团耐受性,并提供中等至良好 (44–88%) 产量的产品。
Zhao, Fei; Zhao, Qing-Jie; Zhang, Da-Zhi, Asian Journal of Chemistry, 2011, vol. 23, # 12, p. 5339 - 5342