目的:合成新型碳酸酐酶磺胺类抑制剂并开发体外优先工作流程以选择用于体内评估的化合物背景:碳酸酐酶 (CA) 抑制剂在青光眼、缺氧性恶性肿瘤和细菌感染的药物发现研究中获得显着关注. 在以前的工作中,我们已经成功地使用直接磺氯化方法开发了多种杂环伯磺胺类药物,它们对治疗相关的 CA 亚型具有显着的活性和选择性。目的:合成和研究新型三氟甲基异恶唑基和三氟甲基吡唑基取代的(杂)芳族磺酰胺的 CA 抑制特性。方法:通过羟基异恶唑啉和吡唑的直接磺氯化,然后与氨反应,合成了十三种三氟甲基异恶唑基和十三种三氟甲基吡唑基取代的(杂)芳族磺酰胺。化合物结构经1H和13C NMR以及元素分析确证。使用 CA 酯酶活性测定法评估获得的化合物阻断牛 CA (bCA) 催化活性的潜力。结果:根据酯酶活性测定数据选择的八种最有效的化合物使用热位移测定 (TSA) 测试了对酶的直接亲和力。这些化合物显示出两位数纳摩尔范围内的
enantioselective bifunctionalsquaramide‐catalyzed detrifluoroacetylativealkylationreaction has been developed under electrochemical conditions. The unified strategy based on this key tandem methodology has been divergently explored for the asymmetric synthesis of fluorine‐containing target molecules with good stereocontrol (up to 95 % ee). Furthermore, this asymmetric catalytic reaction combines the
CO2 and water are the only byproducts of this process, and the reaction conditions can scale up to gram quantities. The transformation involves an unprecedented tBuOK-catalyzed domino process, and features Michael addition/6π-electrocyclic ring opening/[1,5]-H shift/carba-6π-electrocyclic ring closure/decarboxylative aromatization reactions.
Catalytic and Asymmetric Process via P<sup>III</sup>/P<sup>V</sup>═O Redox Cycling: Access to (Trifluoromethyl)cyclobutenes via a Michael Addition/Wittig Olefination Reaction
In the present study, we report the first enantioselective and highly efficient phosphine-catalyzed process via a chemoselective in situ phosphine oxide reduction. Starting with 4,4,4-trifluorobutane-1,3-dione and dialkyl acetylenedicarboxylate substrates, highly functionalized fluorinated cyclobutenes were obtained in excellent yields and enantioselectivities. Using the same methodology, CF3-spirocyclobutene
作者:Li-Juan Xing、Tao Lu、Wei-Li Fu、Mei-Mei Lou、Bo Chen、Zhi-Shen Wang、Yang Jin、Dan Li、Bin Wang
DOI:10.1002/adsc.201500691
日期:2015.10.12
of 1,5-diketones from readily available N,N-dicyclohexylmethylamine, 1,3-dicarbonyl compounds, and trifluoromethyl β-diketones has been developed. This cascade reaction occurs via an oxidation/Mannich reaction/Cope elimination/Michael addition/retro-Claisen reaction sequence, and provides multiple CC bond formations in one pot. In addition, exquisite chemoselectivity is achieved in the reaction between
The invention relates to novel aryl and heteroaryl sulfonates of formula (Ia) and to methods for producing them and to novel aryl and heteroaryl sulfonates of formula (I) for treating and/or preventing diseases, especially for treating pain and neurodegenerative diseases, A representing (C
6
-C
10
)-aryl or 5-10-membered heteroaryl, D representing (C
6
-C
10
)-arylene or 5-10-membered heteroarylene, R
1
representing (C
4
-C
8
)-alkyl, (C
2
-C
8
)-alkyl, the carbon chain being interrupted by one or two heteroatoms or groups chosen from the following group: —O—, —S—, —SO—and —SO
2
—, (C
2
-C
8
)-alkenyl or (C
2
-C
8
)-alkinyl, in formula (Ia); and R
1
representing (C
3
-C
8
)-alkyl, (C
2
-C
8
)-alkyl, the carbon chain being interrupted by one or two heteroatoms or groups chosen from the following group: —O—, —S—,—SO—and —SO
2
—, (C
2
-C
8
)-alkenyl or (C
2
-C
8
)-alkinyl.
A—D—O—SO
2
—R
1
(Ia)
A—D—O—SO
2
—R
1
(I)