2-甲酰基苯基硼酸显示出许多有趣的特征,不仅在合成方面,而且从应用和结构的角度来看也是如此。5-三氟甲基-2-甲酰基苯基硼酸已被合成并表征了其结构和性质。与其类似物相比,吸电子取代基的存在导致酸度显着升高。在一些溶液中,标题化合物发生异构化,形成相应的 3-羟基苯并氧杂环戊二烯。考虑到苯并氧杂硼的抗真菌作用的可能机制,其阻断微生物的细胞质亮氨酰 tRNA 合成酶 (LeuRS),已进行了与酶活性位点的对接研究。它表明环状异构体可能结合到白色念珠菌 LeuRS 的结合口袋中,类似于最近批准的苯并恶唑抗真菌药物(AN2690,Tavaborole,Kerydin)。在大肠杆菌 LeuRS 的情况下,与环状异构体相比,打开的异构体显示出更高的抑制常数。标题化合物的抗微生物活性也在体外进行了研究,显示出对白色念珠菌的中等作用。该化合物对黑曲霉以及大肠杆菌和蜡状芽孢杆菌等细菌具有更高的活性。对于蜡样芽孢杆菌,测定的最小抑制浓度
Synthesis of indazoles from 2-formylphenylboronic acids
作者:Vitalii V. Solomin、Alberts Seins、Aigars Jirgensons
DOI:10.1039/d1ra04056a
日期:——
synthesis of indazoles was developed which involves a copper(II) acetatecatalysed reaction of 2-formylboronic acids with diazadicaboxylates followed by acid or base induced ring closure. Hydrazine dicarboxylates were also shown as competent reaction partners for the synthesis of indazoles, however, they required a stoichiometric amount of copper(II) acetate for the C–N bond formation step. The transformation
开发了一种合成吲唑的方法,该方法包括乙酸铜 ( II ) 催化的 2-甲酰基硼酸与二氮杂二羧酸盐的反应,然后是酸或碱诱导的闭环。肼二羧酸盐也被证明是合成吲唑的有效反应伙伴,然而,它们需要化学计量数量的乙酸铜 ( II ) 来形成 C-N 键。该转化可以作为两步一锅法有效地进行,得到一系列 1 N-烷氧羰基吲唑。
Investigation of a benzodiazaborine library to identify new pH-responsive fluorophores
作者:Hyungjin Cho、Suji Lee、Min Su Han
DOI:10.1039/d2ob00817c
日期:——
We report a new pH-responsive fluorophore that is suitable for sensing extremely alkaline solution based on fluorescence-based high-throughput screening of a benzodiazaborine library.
Rh(III)-Catalyzed Reaction of 4-Diazoisochroman-3-imines with (2-Formylaryl)boronic Acids To Access a Straightforward Construction of 5<i>H</i>-Isochromeno[3,4-<i>c</i>]isoquinolines
作者:Yingxiao Wang、Minghui Qi、Ping Lu、Yanguang Wang
DOI:10.1021/acs.joc.3c01185
日期:2023.10.6
An Rh(III)-catalyzed one-pot synthesis of 5H-isochromeno[3,4-c]isoquinolines from readily available 4-diazoisochroman-3-imines and (2-formylphenyl)boronic acids is reported. The cascade annulation involves a Rh(III)-catalyzed cross-coupling and an intramolecular nucleophilic addition–elimination process. A series of biologically important 5H-isochromeno[3,4-c]isoquinolines were obtained in good to
据报道,Rh(III) 催化从容易获得的 4-重氮异苯并二氢吡喃-3-亚胺和 (2-甲酰基苯基)硼酸一锅合成5 H-异苯并[3,4 - c ]异喹啉。级联成环涉及 Rh(III) 催化的交叉偶联和分子内亲核加成-消除过程。以良好至优异的产率获得了一系列具有生物学重要意义的 5 H -异色烯[3,4- c ]异喹啉。该方法可扩展至从7 H-异色并[3,4- b ]噻吩并[3,2- d ]吡啶和 7 H-异色并[3,4- b ]噻吩并[2,3- d ]吡啶合成。相应的杂芳基硼酸。
Highly Enantioselective Synthesis of Phosphorus‐Containing ϵ‐Benzosultams by Bifunctional Phosphonium Salt‐Promoted Hydrophosphonylation
作者:Song Zhang、Zhenghuai Feng、Chunhui Jiang、Xiaojun Yu、Jianke Pan、Juan Du、Zhiyu Jiang、Yuan Chen、Tianli Wang
DOI:10.1002/chem.202101038
日期:2021.8.5
with diverse biological activities. A series of chiral ϵ-benzosultams bearing phosphorus functionalities was synthesized by catalytic asymmetric hydrophosphonylation in the presence of a bifunctional phosphonium salt catalyst. The desired hydrophosphonylation products were obtained in good yields with high enantioselectivities, and scale-up reactions and further derivations were successfully accomplished
Synthesis, Properties and Antimicrobial Activity of 5-Trifluoromethyl-2-formylphenylboronic Acid
作者:Agnieszka Adamczyk-Woźniak、Jan T. Gozdalik、Dorota Wieczorek、Izabela D. Madura、Ewa Kaczorowska、Ewa Brzezińska、Andrzej Sporzyński、Jacek Lipok
DOI:10.3390/molecules25040799
日期:——
2-Formylphenylboronic acids display many interesting features, not only from synthetic but also from an application as well as structural points of view. 5-Trifluoromethyl-2-formyl phenylboronic acid has been synthesized and characterized in terms of its structure and properties. The presence of an electron-withdrawing substituent results in a considerable rise in the acidity in comparison with its
2-甲酰基苯基硼酸显示出许多有趣的特征,不仅在合成方面,而且从应用和结构的角度来看也是如此。5-三氟甲基-2-甲酰基苯基硼酸已被合成并表征了其结构和性质。与其类似物相比,吸电子取代基的存在导致酸度显着升高。在一些溶液中,标题化合物发生异构化,形成相应的 3-羟基苯并氧杂环戊二烯。考虑到苯并氧杂硼的抗真菌作用的可能机制,其阻断微生物的细胞质亮氨酰 tRNA 合成酶 (LeuRS),已进行了与酶活性位点的对接研究。它表明环状异构体可能结合到白色念珠菌 LeuRS 的结合口袋中,类似于最近批准的苯并恶唑抗真菌药物(AN2690,Tavaborole,Kerydin)。在大肠杆菌 LeuRS 的情况下,与环状异构体相比,打开的异构体显示出更高的抑制常数。标题化合物的抗微生物活性也在体外进行了研究,显示出对白色念珠菌的中等作用。该化合物对黑曲霉以及大肠杆菌和蜡状芽孢杆菌等细菌具有更高的活性。对于蜡样芽孢杆菌,测定的最小抑制浓度