Tritylium assisted iodine catalysis for the synthesis of unsymmetrical triarylmethanes
作者:Thibaut Courant、Marine Lombard、Dina V. Boyarskaya、Luc Neuville、Géraldine Masson
DOI:10.1039/d0ob01502d
日期:——
The combined Lewis acid catalytic system, generated from molecular iodine and tritylium tetrafluoroborate effectively catalyzed the Friedel–Crafts (FC) arylation of diarylmethyl sulfides providing an efficient access to various unsymmetrical triarylmethanes. The addition of tritylium and iodine created a more active catalytic system to promote the cleavage of sulfidic C–S bonds.
Kinetic and Dynamic Kinetic Resolution of Secondary Alcohols with Ionic-Surfactant-Coated <i>Burkholderia cepacia</i> Lipase: Substrate Scope and Enantioselectivity
作者:Cheolwoo Kim、Jusuk Lee、Jeonghun Cho、Yeonock Oh、Yoon Kyung Choi、Eunjeong Choi、Jaiwook Park、Mahn-Joo Kim
DOI:10.1021/jo3027627
日期:2013.3.15
Forty-four different secondaryalcohols, which can be classified into several types (II-IX), were tested as the substrates of ionic surfactant-coated Burkholderiacepacialipase (ISCBCL) to see its substrate scope and enantioselectivity in kinetic and dynamickineticresolution (KR and DKR). They include 6 boron-containing alcohols, 24 chiral propargyl alcohols, and 14 diarylmethanols. The results
Dynamic Kinetic Resolution of Diarylmethanols with an Activated Lipoprotein Lipase
作者:Jusuk Lee、Yeonock Oh、Yoon Kyung Choi、Eunjeong Choi、Kyungwoo Kim、Jaiwook Park、Mahn-Joo Kim
DOI:10.1021/cs501629m
日期:2015.2.6
We explored the kinetic resolution of 31 different diarylmethanols with an activated lipoprotein lipase (LPL-D1) which was about 3000-fold more active than its native counterpart in organic solvent. Most of the substrates tested were accepted by LPL-D1 with good to high enantioselectivity in the kinetic resolution. Next, we explored the dynamic kinetic resolutions (DKRs) of these substrates (24 out of 31) using LPL-D1 and a ruthenium-based racemization catalyst in combination, which provided satisfactory yields (71-96%) and high enantiopurities (90-99% cc). As an illustrative example for the synthetic applications of the DKR procedure, we synthesized L-cloperastine, an antitussive drug, from phenyl-(p-trimethylsilylphenyl)methanol via DKR.
Structure-Based Virtual Screening, Synthesis and Biological Evaluation of Potential FAK-FAT Domain Inhibitors for Treatment of Metastatic Cancer
作者:Sahar B. Kandil、Samuel R. Jones、Sonia Smith、Stephen E. Hiscox、Andrew D. Westwell
DOI:10.3390/molecules25153488
日期:——
Focal adhesion kinase (FAK) is a tyrosine kinase that is overexpressed and activated in several advanced-stage solid cancers. In cancercells, FAK promotes the progression and metastasis of tumours. In this study, we used structure-based virtual screening to filter a library of more than 210K compounds against the focal adhesion targeting FAK-focal adhesion targeting (FAT) domain to identify 25 virtual
粘着斑激酶 (FAK) 是一种酪氨酸激酶,在几种晚期实体癌中过度表达和激活。在癌细胞中,FAK 促进肿瘤的进展和转移。在这项研究中,我们使用基于结构的虚拟筛选针对粘着斑靶向 FAK-粘着斑靶向 (FAT) 域过滤了超过 210K 化合物的库,以识别在浸润性乳腺癌细胞系中筛选的 25 种虚拟命中化合物。 MDA-MB-231)。最值得注意的是,化合物 I 显示出低微摩尔的抗增殖活性以及抗迁移活性。此外,在三阴性乳腺癌 (TNBC) 模型中的检查表明,尽管不影响 FAK 磷酸化,但化合物 I 显着损害增殖,同时损害粘着斑生长和周转,导致迁移减少。使用四步合成程序对先导化合物 I 的类似物进行了进一步优化和合成,并评估了类似物对三种乳腺癌(MDA-MB-231、T47D、BT474)细胞系和一种胰腺癌的抗增殖活性(MIAPaCa2) 细胞系。化合物 5f 被鉴定为有前途的先导化合物,其在 MDA-MB-231、T47D、BT474