Synthesis and binding assays of novel 3,3-dimethylpiperidine derivatives with various lipophilicities as σ1 receptor ligands
摘要:
Starting from two carbocyclic analogs, a series of 3,3-dimethylpiperidine derivatives was prepared and tested in radioligand binding assays at sigma(1) and sigma(2) receptors, and at Delta(8)-Delta(7) sterol isomerase (SI) site. The novel compounds mostly bear heterocyclic rings or bicyclic nucleus of differing lipophilicities. Compounds 18a and 19a,b demonstrated the highest sigma(1) affinity (K-i = 0.14-0.38 nM) with a good selectivity versus sigma(2) binding. Among them, 18a had the lowest C log D value (3.01) and only 19b was selective versus SI too. Generally, it was observed that more planar and hydrophilic heteronuclei conferred a decrease in affinity for both sigma receptor subtypes. (C) 2011 Elsevier Ltd. All rights reserved.
Palladium-Mediated Oxidative Annulation of δ-Indolyl-α,β-Unsaturated Compounds toward the Synthesis of Cyclopenta[<i>b</i>]indoles and Heterogeneous Hydrogenation To Access Fused Indolines
作者:André Capretz Agy、Manoel T. Rodrigues、Lucas A. Zeoly、Deborah A. Simoni、Fernando Coelho
DOI:10.1021/acs.joc.9b00505
日期:2019.5.3
The cyclopenta[b]indole moiety represents a key skeletal unit in several natural and synthetic compounds that exhibit diverse biological properties. We described herein a two-step sequence for synthesizing cyclopenta[b]indoles with great structural diversity in overall yields up to 37%. The key step was a palladium-catalyzed oxidative annulation of 3-alkylindoles (Fujiwara–Moritani reaction). The obtained
环戊[ b ]吲哚部分代表几种天然和合成化合物的关键骨架单元,这些化合物表现出多种生物学特性。我们在本文中描述了用于合成具有巨大结构多样性的环戊并[ b ]吲哚的两步序列,总产率高达37%。关键步骤是钯催化的3-烷基吲哚的氧化环化反应(藤原-莫里塔尼反应)。所获得的环戊[ b ]吲哚被用作非均相氢化反应的底物,从而以中等收率提供了新的熔融二氢吲哚。三个这样的二氢吲哚的酸催化的分子内环化反应以89%,90%和61%的收率得到四环内酰胺。
<i>N</i>-Hydroxyphthalimidyl diazoacetate (NHPI-DA): a modular methylene linchpin for the C–H alkylation of indoles
作者:Rajdip Chowdhury、Abraham Mendoza
DOI:10.1039/d1cc01026c
日期:——
The insertion of conventional diazocompounds into indoles are still limited by the custom carbene precursors, catalysts and manipulation of the products required. Herein, we address these shortcomings with a redox-active carbene precursor (NHPI-DA).
Efficient protocol for Aza-Michael addition of N-heterocycles to α,β-unsaturated compound using [Ch]OH and [<i>n</i>-butyl urotropinium]OH as basic ionic liquids in aqueous/solvent free conditions
作者:Sitanshu Kumar、Amanpreet Kaur、Vasundhara Singh
DOI:10.1080/00397911.2018.1546401
日期:2019.1.17
basic ionic liquid, [n-butyl Urotropinium]OH, and commercially available aqueous solution of choline hydroxide [Ch]OH as catalysts for executing Aza-Michael addition of N-heterocycles to α,β-unsaturated compounds at room temperature. The highlighting features of these catalysts include using low concentration of both catalysts along with [Ch]OH being low cost and biodegradable, [n-butyl Urotropinium]OH
Selective N-Alkylation of Indoles with α,β-Unsaturated Compounds Catalyzed by a Monomeric Phosphate
作者:Hanako Sunaba、Keigo Kamata、Noritaka Mizuno
DOI:10.1002/cctc.201402309
日期:2014.8
Catalytic N‐alkylation of indoles is challenging because the N1 nitrogen atoms are inert toward electrophilic reagents. Herein, an organic‐solvent‐soluble alkylammonium salt of a simple monomeric phosphate ion, [PO4]3−, with a high charge density acts as an efficient homogeneous catalyst for selective N‐alkylation of indoles with α,β‐unsaturated compounds. For the reaction of indole with ethyl acrylate
Supramolecular Hydrogels of Indole-Capped Short Peptides as Vaccine Adjuvants
作者:Zhongyan Wang、Yanbin Cai、Linan Yi、Jie Gao、Zhimou Yang
DOI:10.1002/cjoc.201600813
日期:2017.7
immnogenicity of subunit vaccines. Among them, peptide‐based hydrogels are gradually coming into notice because of their application in drugs delivery, cancer cell inhibition, vaccine adjuvants and detection of important analytes. In this work, we introduced a novel aromatic capping group based on indole to construct short peptide‐based supramolecular hydrogelators Indol‐GFFY and Indol‐GDFDFDY and
研究了许多材料作为免疫佐剂,以帮助提高亚单位疫苗的免疫原性。其中,基于肽的水凝胶由于其在药物递送,癌细胞抑制,疫苗佐剂和重要分析物检测中的应用而逐渐受到关注。在这项工作中,我们引入了一个基于吲哚的新型芳香族封端基团,以构建基于短肽的超分子水凝胶剂Indol-GFFY和Indol-G D F D F D Y,并展示了它们作为疫苗佐剂的潜在应用。