Development of novel NK3 receptor antagonists with reduced environmental impact
摘要:
The neurokinin B (NKB)-neurokinin-3 receptor (NK3R) signaling positively regulates the release of gonadotropin-releasing hormone (GnRH) from the hypothalamus. The NK3R-selective antagonists may suppress the reproductive functions of mammals. For development of novel NK3R antagonists with reduced environmental toxicity, a structure-activity relationship study of an NK3R antagonist, talnetant, was carried out. Among several talnetant derivatives with labile functional groups in the natural environment, 3-mercaptoquinoline 2f exhibited a comparable biological activity to that of the parent talnetant. Additionally, compound 2f was converted into the disulfide 3f or isothiazolone 8 by air-oxidation, both of which showed no binding affinity to NK3R. (C) 2016 Elsevier Ltd. All rights reserved.
OXIDATIVE CYCLISATION WITH THALLIUM (III) ACETATE: SYNTHESIS OF 3(2<i>H</i>)-BENZOFURANONES
作者:Nongyao Malaitong、Chachanat Thebtaranonth
DOI:10.1246/cl.1980.305
日期:1980.3.5
The reaction of thallium (III) acetate with enolisable o-hydroxy and o-methoxyphenyl ketones in acetic acid gave predominantly 2-acetoxy-3(2H)-benzofuranones.
Pd-Catalyzed TBHP-Mediated Selective Wacker-Type Oxidation and Oxo-acyloxylation of Olefins Using a 2-(1<i>H</i>-Indazol-1-yl)quinoline Ligand
作者:Shuaizhong Zhang、Jinquan Zhang、Hongbin Zou
DOI:10.1021/acs.orglett.3c00326
日期:2023.3.24
Pd(II)-catalyzed oxidation of terminal olefins to methyl ketones has emerged as an attractive strategy for organic synthesis. Here we report the Pd(II)-catalyzed selective oxidation of olefinsusing tert-butyl hydroperoxide as the oxidant and 2-(1H-indazol-1-yl)quinoline as the ligand. A wide range of olefins were well tolerated in this reaction system to provide methyl ketones, whereas the presence
Pd(II) 催化的末端烯烃氧化成甲基酮已成为一种有吸引力的有机合成策略。在这里,我们报告了使用叔丁基氢过氧化物作为氧化剂和 2-(1 H -吲唑-1-基)喹啉作为配体的Pd(II) 催化的烯烃选择性氧化。在该反应体系中,广泛的烯烃具有良好的耐受性以提供甲基酮,而 Ac 2的存在O 引发氧代-酰氧基化以提供 α-乙酰氧基丙酮产物。进行同位素标记研究和活性中间体捕获实验以阐明潜在的选择性反应机制。值得注意的是,α-乙酰氧基丙酮产物的产生涉及烯醇钯中间体,而甲基酮产物是通过最常提出的烷基过氧化物中间体产生的,然后是 1,2-氢化物迁移。
Hypervalent-iodine-mediated oxidation followed by the acetoxylation/tosylation of α-substituted benzylamines to obtain α-acyloxy/tosyloxy ketones
作者:Bapurao D. Rupanawar、Kishor D. Mane、Gurunath Suryavanshi
DOI:10.1039/d2nj02271k
日期:——
An efficient and metal-free method has been developed for the sequential oxidation of α-alkylbenzylamines followed by acetoxylation or tosylation for the synthesis of α-acyloxy/tosyloxy ketones using hypervalent iodine(III). The employment of a simple starting material, broad substrate scope and operational simplicity are the key features of this protocol.
已经开发了一种高效且无金属的方法,用于顺序氧化 α-烷基苄胺,然后使用高价碘 ( III ) 进行乙酰氧基化或甲苯磺酰化合成 α-酰氧基/甲苯磺酰氧基酮。使用简单的起始材料、广泛的底物范围和操作简单是该协议的主要特点。
One‐Pot Synthesis of α‐Formyloxy Ketones from Enolizable Ketones
作者:Sunil Kumar、Ashok Kumar、Rakesh K. Gupta、Devinder Kumar
DOI:10.1080/00397910701767049
日期:2008.1.1
One-pot synthesis of alpha-formyloxy tones as well as alpha-acetoxy ketones from enolizable ketones and [hydroxy(tosyloxy)iodo] benzene (HTIB)/polymer supported [hydroxy(tosyloxy)iodo]benzene (PSHTIB) in N,N - dimethylformamide (DMF)/N,N - dimethylacetamide (DMA) in high yields is described.