Optically Active Antifungal Azoles. III. Synthesis and Antifungal Activity of Sulfide and Sulfonamide Derivatives of (2R,3R)-2-(2,4-Difluorophenyl)-3-mercapto-1- (lH-1,2,4-triazol-1-yl)-2-butanol.
In an effort to find potent antifungal agents, optically active sulfur-containing triazole derivatives, sulfides (3) and sulfonamides (4), were prepared and evaluated for antifungal activity against Candida albicans in vitro and in vivo. The sulfides (3) were prepared by the reaction of (2R, 3R)-2-(2, 4-difluorophenyl)-3-mercapto-1-(1H, 1, 2, 4-triazol-1-yl)-2-butanol (1) with various heteroarylmethyl chlorides in the presence of sodium methoxide. The sulfonamides (4) were synthesized starting from the disulfide (15) in three steps including oxidation of the corresponding sulfenamides (17). Some of the sulfur-containing triazole derivatives (3, 4) showed strong protective effects against candidosis in mice.
The tumor microenvironment is considered as one of the important targets for anticancer drug discovery. In particular, nutrient deficiency may be observed in tumor microenvironment; biakamides A–D (1–4) isolated from marine sponge Petrosaspongia sp. as growth inhibitors against cancer cells adapted to glucose-deprived conditions have potential as new drugs and tools for elucidating adaptation mechanisms to these conditions. In this paper, we investigated structure–activity relationship (SAR) of biakamide to create easily accessible analog and gain insights about participation of the substructures to growth–inhibitory activity toward development of anticancer drug. This work revealed that 14,15-dinor-biakamide C (5), which is easily accessible, has similar activity to natural biakamide C (3). In addition, detailed SAR study showed the terminal acyl chain is important for interacting with target molecule and amide part including thiazole ring has acceptability to convert structures without losing activity.
Total Synthesis of Micromide: a Marine Natural Product
作者:Jianrong Han、Jingtang Lian、Xia Tian、Shengwei Zhou、Xiaoli Zhen、Shouxin Liu
DOI:10.1002/ejoc.201402977
日期:2014.11
This paper describes an efficient procedure for the synthesis of micromide, a naturalproduct that shows anti-solid-tumor activity. Our strategy involved the synthesis of N-nosyl-protected amino acids and their N-methylation with iodomethane. The hindered oligopeptides containing N-methyl amino acids were synthesized in excellent yields and high purities.
[EN] CARBAPENEM ANTIBACTERIALS WITH GRAM-NEGATIVE ACTIVITY AND PROCESSES FOR THEIR PREPARATION<br/>[FR] BACTERICIDES AU CARBAPENEM A ACTIVITE GRAM-NEGATIVE ET PROCEDES D'ELABORATION CORRESPONDANTS
申请人:FOB SYNTHESIS
公开号:WO2005123066A1
公开(公告)日:2005-12-29
The present invention provides β-methyl carbapenem compounds and pharmaceutical compositions useful in the treatment of bacterial infections and methods for treating such infections using such compounds and/or compositions. The invention includes administering an effective amount of a carbapenem compound or salt and/or prodrug thereof to a host in need of such a treatment. The present invention is also in the field of synthetic organic chemistry and is specifically provides an improved method of synthesis of β-methyl carbapenems which are useful as antibacterial agents.
Total synthesis of biseokeaniamides A–C and late-stage electrochemically-enabled peptide analogue synthesis
作者:Yutong Lin、Lara R. Malins
DOI:10.1039/d0sc03701j
日期:——
biseokeaniamides A–C is reported employing a robust solid-phase approach to peptide backbone construction followed by coupling of a key thiazole building block. To rapidly access natural product analogues, we have optimized an operationally simple electrochemical oxidative decarboxylation–nucleophilic addition pathway which exploits the reactivity of native C-terminal peptide carboxylates and abrogates the