平面 NNN-钳形复合物 [M II (pyN 2 Me2 )(OH)] 1– (M II = Ni, Cu) 将 CO 2固定在 η 1 -OCO 2 H 复合物中;描述了铜系统的结果。Mn II、Fe II、Co II和Zn II表现不同,形成[M II (pyN 2 Me2 ) 2 ] 2–与N 4 O 2配位。将 Ni II钳并入双核大环2含有由两个 1,3-亚联苯基连接的三氨基 M II位点提供了近端 Ni II和 M II位点,用于研究 Ni-X-M 桥单元的合成、结构和反应性。这种配体结构被用作 M II原子和结合位点和桥 X = OH -和 CN -变化的参考,以产生具有改进特性的大环家族的其他成员。显示具有 22 元环的大环2以羟基桥键结合 M II = Mn、Fe 和 Cu。引入 4-Bu i O 基团(大环3) 提高了中性配合物的溶解度,例如那些具有 Ni II -OH-Cu
diseases. Mycophenolic acid (MPA) and its derivatives are currently one of the most prescribed immunosuppressive drugs; however, metabolic drawbacks and variable interand intrapatient responses limit their use. Objective: In order to find out new safe and effective immunosuppressive compounds, we report here the synthesis and pharmacological evaluation of hybrid MPA derivatives containing the thalidomide/
NDIPhos as a platform for chiral supramolecular ligands in rhodium-catalyzed enantioselective hydrogenation
作者:Guillaume Force、Robert J. Mayer、Marie Vayer、David Lebœuf
DOI:10.1039/d3cc00695f
日期:——
Chiral naphthalene diimide ligands (NDIPhos) were exploited in rhodium-catalyzed enantioselective hydrogenation. The key feature of these ligands is their ability to self-assemble via π–π interactions to mimic bidentate ligands, offering a complementary method to traditional supramolecular strategies. This concept was further substantiated by computations with the composite electronic-structure method
手性萘二酰亚胺配体 (NDIPhos) 被用于铑催化的对映选择性氢化。这些配体的关键特征是它们能够通过π-π 相互作用自组装以模拟双齿配体,为传统的超分子策略提供了一种补充方法。复合电子结构方法 r 2 SCAN-3c 的计算进一步证实了这一概念。
Design, Synthesis, and Pharmacological Evaluation of Novel Hybrid Compounds To Treat Sickle Cell Disease Symptoms
作者:Jean Leandro dos Santos、Carolina Lanaro、Lídia Moreira Lima、Sheley Gambero、Carla Fernanda Franco-Penteado、Magna Suzana Alexandre-Moreira、Marlene Wade、Shobha Yerigenahally、Abdullah Kutlar、Steffen E. Meiler、Fernando Ferreira Costa、ManChin Chung
DOI:10.1021/jm200531f
日期:2011.8.25
A novel series of thalidomide derivatives (4a-f) designed by molecular hybridization were synthesized and evaluated in vitro and in vivo for their potential use in the oral treatment of sickle cell disease symptoms. Compounds 4a-f demonstrated analgesic, anti-inflammatory, and NO-donor properties. Compounds 4c and 4d were considered promising candidate drugs and were further evaluated in transgenic sickle cell mice to determine their capacity to reduce the levels of the proinflammatory cytokine tumor necrosis factor alpha (TNF alpha). Unlike hydroxyurea, the compounds reduced the concentrations of TNF alpha to levels similar to those induced with the control dexamethasone (300 mu mol/kg). These compounds are novel lead drug candidates with multiple beneficial actions in the treatment of sickle cell disease symptoms and offer an alternative to hydroxyurea treatment.
Antiplatelet activity and TNF-α release inhibition of phthalimide derivatives useful to treat sickle cell anemia
作者:Rafael C. Chelucci、Isabela J. de Oliveira、Karina P. Barbieri、Maria E. Lopes-Pires、Marisa C. Polesi、Diego E. Chiba、Iracilda Z. Carlos、Sisi Marcondes、Jean L. Dos Santos、ManChin Chung
DOI:10.1007/s00044-019-02371-z
日期:2019.8
Sickle Cell Anemia (SCA) is one of the most prevalent hereditary hematological diseases worldwide. The disease is characterized by chronic inflammation, hypercoagulable state, and pro-thrombotic profile, which lead the vaso-occlusive process. In this work, we described the antiplatelet activity and the ability to reduce tumor necrosis factor-alpha (TNF-) levels of phthalimide derivatives. All compounds inhibited platelet aggregation induced by collagen and adenosine diphosphate, at levels ranging from 26.0 to 74.2% and 30.7 to 79.6%, respectively. The compounds exhibited reduced bleeding time compared to acetylsalicylic acid (ASA). Moreover, compounds 4c and 10c inhibited TNF- levels at 73.5% and 65.0%, respectively. These findings suggest that phthalimide derivatives 4c and 10c are promising lead compounds useful to prevent vaso-occlusion and inflammation associated with the sickle cell anemia.[GRAPHICS].
Preparation of acetals from aldehydes and alcohols under basic conditions
作者:Jakub Grabowski、Jarosław M. Granda、Janusz Jurczak
DOI:10.1039/c8ob00017d
日期:——
A new, simple protocol for the synthesis of acetalsunder basic conditions from non-enolizable aldehydes and alcohols has been reported. Such reactivity is facilitated by a sodium alkoxide along with a corresponding trifluoroacetate ester, utilizing formation of sodium trifluoroacetate as a driving force for acetalformation. The usefulness of this protocol is demonstrated by its orthogonality with