描述了使用烯烃转化作为关键步骤方便地合成[1-14C]-单反式脂肪酸的方法。这种方法可以轻松合成油酸,亚油酸和亚麻酸的[1-14C]标记的单反式类似物。例如,仅需十一个步骤即可从其商业全Z形式获得亚麻酸的[1-14C]-单-E异构体。在第一步中,Barton的脱羧过程产生了溴中间体。该化合物的环氧化导致形成三个单环氧化物,可以通过HPLC进行分离。通过1 H NMR和MS鉴定后,然后对纯单环氧化物进行转化,该转化包括立体定向脱氧,然后进行β消除步骤。最后,
1-Substituted-5-[(3,5-dinitrobenzyl)sulfanyl]-1H-tetrazoles and their isosteric analogs: A new class of selective antitubercular agents active against drug-susceptible and multidrug-resistant mycobacteria
In this work, a newclass of highly potent antituberculosis agents, 1-substituted-5-[(3,5-dinitrobenzyl)sulfanyl]-1H-tetrazoles and their oxa and selanyl analogs, is described. The minimal inhibitory concentration (MIC) values reached 1 μM (0.36–0.44 μg/mL) against Mycobacterium tuberculosis CNCTC My 331/88 and 0.25–1 μM against six multidrug-resistant clinically isolated strains of M. tuberculosis
Biocatalytic synthesis of diaryl disulphides and their bio-evaluation as potent inhibitors of drug-resistant <i>Staphylococcus aureus</i>
作者:Saima、Isha Soni、Aditya G. Lavekar、Manjulika Shukla、Danish Equbal、Arun K. Sinha、Sidharth Chopra
DOI:10.1002/ddr.21507
日期:2019.2
novel molecules to thwart the continuing emergence of antimicrobial resistance. Disulphide containing small molecules has gained prominence as antibacterials. As their conventional synthesis requires tedious synthetic procedure and sometimes toxic reagents, a green and environmentally benign protocol for their synthesis has been developed through which a series of molecules were obtained and evaluated
Nine-Step Enantioselective Total Synthesis of (−)-Vincorine
作者:Benjamin D. Horning、David W. C. MacMillan
DOI:10.1021/ja402933s
日期:2013.5.1
highly enantioselective total synthesis of the akuammiline alkaloid (-)-vincorine has been accomplished. A key element of the synthesis is a stereoselective organocatalytic Diels-Alder, iminium cyclization cascade sequence, which serves to construct the tetracyclic alkaloid core architecture in one step from simple achiral precursors. The challenging seven-membered azepanyl ring system is installed by way