这项研究描述了一系列新型取代的1-(氨基甲基)-2-(芳基乙酰基)-1,2,3,4-四氢异喹啉的合成,并讨论了它们对阿片受体的结合亲和力与它们的结构活性关系(SAR)。抗伤害感受力作为生物活性的指标。在异喹啉核的5位上引入羟基取代基产生了一种化合物40,其效力比抗伤害感受的小鼠模型中先前公开的未取代类似物39强2倍。对5-取代基的QSAR分析清楚地表明,抗伤害感受活性与取代基的亲脂性成反比。与未取代的异喹啉39相比,本文所述的取代化合物对κ阿片受体的选择性较低。5-羟基取代的化合物59对kappa阿片受体具有很高的亲和力(Ki kappa = 0.09 nM),Ki mu / Ki kappa之比仅为5。但是,多元线性回归分析表明,抗伤害性与对μ阿片样物质受体的亲和力。另一方面,对κ阿片受体的结合亲和力与抗伤害感受活性之间的相关性具有统计学意义。
Cyanomethyl anion transfer reagents for diastereoselective Corey–Chaykovsky cyclopropanation reactions
作者:Renè Hommelsheim、Katharina J. Hock、Christian Schumacher、Mohanad A. Hussein、Thanh V. Nguyen、Rene M. Koenigs
DOI:10.1039/c8cc05602a
日期:——
A readily available and bench-stable cyanomethyl sulfonium salt was used in highly diastereoselective Corey–Chaykovsky cyclopropanationreactions of electron-poor olefins. This efficient method provides a rapid route to access densely functionalized cyclopropyl nitriles.
<scp>β‐Nitrostyrenes</scp>
as a valuable precursor for the synthesis of β‐aryl‐γ‐lactam and 2‐oxo‐1,2‐dihydroquinoline derivatives
作者:Dandamudi V. Lenin、Disha Patel、Payal Malvi
DOI:10.1002/jhet.4446
日期:2022.3
2-dihydroquinoline derivatives using β-nitrostyrenes. The reaction strategy involves the Michaeladdition followed by reduction and cyclization reactions. Michael adducts containing two different nitro group such as one on aryl ring and another on side chain, selectively takes the path to involve nitro group on aryl to form 2-oxo-1,2-dihydroquinoline derivatives as cyclized product. Michael adducts with
Abstract An efficient and safe method for nitration of aromatic compounds and decarboxylative nitration of α,β-unsaturated acids was developed using trichloroisocyanuric acid (TCICA)/dimethylformamide (DMF) in the presence of NaNO2. The reaction times of conventional protocol reduced from 8–10 h to 1.0–1.5 h (60–90 min) under sonication, even though the yields are comparable under both the conditions
Zeolite Y-assisted nitration of aromatic and heterocyclic compounds and decarboxylative nitration of α,β-unsaturated acids under non-conventional conditions
作者:V. Sudhakar Chary、K. C. Rajanna、G. Krishnaiah、P. Srinivas
DOI:10.1039/c5cy00919g
日期:——
Zeolite Y was found to be an efficient catalyst for a facile nitration of aromaticcompounds with acetonitrile as the solvent in the presence of small amounts of HNO3 at room temperature. The reactions afforded mono-nitro derivatives of aromaticcompounds in about three hours under stirred conditions with high yields and regioselectivity. The reaction times drastically reduced to about 20 min under
Substrate Promiscuity of <i>ortho</i>-Naphthoquinone Catalyst: Catalytic Aerobic Amine Oxidation Protocols to Deaminative Cross-Coupling and <i>N</i>-Nitrosation
作者:Tengda Si、Hun Young Kim、Kyungsoo Oh
DOI:10.1021/acscatal.9b03442
日期:2019.10.4
been identified as versatile aerobicoxidationcatalysts. Primary amines were readily cross-coupled with primary nitroalkanes via deaminative pathway to give nitroalkene derivatives in good to excellent yields. Secondary and tertiary amines were inert to ortho-naphthoquinone catalysts; however, secondary nitroalkanes were readily converted by ortho-naphthoquinone catalysts to the corresponding nitrite