Selection between Pinching-Type and Supramolecular Polymer-Type Complexes by α-Cyclodextrin−β-Cyclodextrin Hetero-Dimer and Hetero-Cinnamamide Guest Dimers
摘要:
Novel supramolecular complexes have been prepared from an alpha-cyclodextrin-beta-cyclodextrin heterodimer (alpha-CD-beta-CD hetero-dimer) and hetero-cinnamamide guest dimers, G-t-Boc and G-NH2, having adamantyl groups in aqueous solutions. On addition of the competitive guest, the supramolecular structure formed by a mixture of the alpha-CD-beta-CD hetero-dimer and G-t-Boc was found to be different from that of a mixture of the alpha-CD-beta-CD hetero-dimer and G-NH2 by the H-1 NMR spectroscopy, the ROESY NMR spectroscopy, and the circular dichroism spectroscopy. The size of the supramolecular complex from the mixture of the alpha-CD-beta-CD hetero-dimer and G-NH2 is larger than that from the mixture of the alpha-CD-beta-CD hetero-dimer and G-t-Boc, which was proved by the pulse field gradient spin-echo NMR and the atomic force microscopy. These results suggest that the mixture of the alpha-CD-beta-CD hetero-dimer and G-t-Boc formed a pinching-type complex, and the mixture of the alpha-CD-beta-CD hetero-dimer and G-NH2 formed a supramolecular polymer-type complex.
Efficient Synthesis of 1,4-Thiazepanones and 1,4-Thiazepanes as 3D Fragments for Screening Libraries
作者:Anil K. Pandey、Steven E. Kirberger、Jorden A. Johnson、Jennifer R. Kimbrough、Danika K. D. Partridge、William C. K. Pomerantz
DOI:10.1021/acs.orglett.0c01230
日期:2020.5.15
ring systems with highly 3D character and are currently underrepresented in fragment screening libraries. A nuclear magnetic resonance (NMR) fragment screen identified 1,4-acylthiazepanes as new BET (bromodomain and extraterminal domain) bromodomain ligands; however, an efficient and readily diversified synthesis for library development has not been reported. Here we report a one-pot synthesis using
1,4-Thiazepanes 和 1,4-thiazepanones 代表具有高度 3D 特征的七元环系统,目前在片段筛选库中代表性不足。核磁共振 (NMR) 片段筛选将 1,4-酰基硫氮杂环鉴定为新的 BET(溴结构域和末端外结构域)溴结构域配体;然而,用于库开发的高效且易于多样化的合成尚未见报道。在这里,我们报告了使用 α,β-不饱和酯和 1,2-氨基硫醇形成 1,4-噻嗪酮作为具有高 3D 特征的 1,4-噻嗪酮的前体的一锅法合成。该反应在合理的时间(0.5-3 小时)内以良好的产率进行,并且可以耐受范围广泛的 α,β-不饱和酯。几个 1, 4-噻嗪类通过两步转化合成,并使用蛋白质观察 19F NMR 表征为新的 BET 溴结构域配体。这种合成应该可以方便地访问各种 3D 片段以筛选库。
N-Cinnamoylated Chloroquine Analogues as Dual-Stage Antimalarial Leads
作者:Bianca C. Pérez、Cátia Teixeira、Inês S. Albuquerque、Jiri Gut、Philip J. Rosenthal、José R. B. Gomes、Miguel Prudêncio、Paula Gomes
DOI:10.1021/jm301654b
日期:2013.1.24
resistance, and new antimalarial drugs are needed. New drug discovery efforts include consideration of hybrid compounds as potential multitarget antimalarials. Previous work from our group has demonstrated that hybrid structures resulting from cinnamic acid conjugation with heterocyclic moieties from well-known antimalarials present improved antimalarialactivity. Now, we report the synthesis and SAR analysis
Toward a Scalable Synthesis and Process for EMA401, Part II: Development and Scale-Up of a Pyridine- and Piperidine-Free Knoevenagel–Doebner Condensation
作者:Eric Sidler、Roger Humair、Leo A. Hardegger
DOI:10.1021/acs.oprd.0c00216
日期:2020.9.18
synthesis of key amino acid intermediate 2via its cinnamic acid derivative 3 as a streamlined option. In general, cinnamic acids can be synthesized from the corresponding aldehydes by a Knoevenagel–Doebnercondensation in pyridine with piperidine as an organocatalyst. We aimed to replace both of these reagents and found novel conditions involving toluene as the solvent and morpholine as the organocatalyst
Substituted azole derivatives as therapeutic agents
申请人:——
公开号:US20040186151A1
公开(公告)日:2004-09-23
This invention provides azoles which may be useful as inhibitors of protein tyrosine phosphatases (PTPases). The present invention provides compounds of Formula (I), methods of their preparation, pharmaceutical compositions comprising the compounds and their use in treating human or animal disorders. The compounds of the invention may be useful as inhibitors of protein tyrosine phosphatases and thus can be useful for the management, treatment, control and adjunct treatment of diseases mediated by PTPase activity. Such diseases include Type I diabetes, Type II diabetes.