Synthesis of isothiosemicarbazones of potential antitumoral activity through a multicomponent reaction involving allylic bromides, carbonyl compounds and thiosemicarbazide
作者:Laiéli S. Munaretto、Misael Ferreira、Daniela P. Gouvêa、Adailton J. Bortoluzzi、Laura S. Assunção、Juliana Inaba、Tânia B. Creczynski-Pasa、Marcus M. Sá
DOI:10.1016/j.tet.2020.131231
日期:2020.6
of isothiosemicarbazones and 2-hydrazono-1,3-thiazin-4-ones through a multicomponent reaction featuring allylic bromides, carbonylcompounds and thiosemicarbazides is described. The transformations proceed under mild and environmentally benign conditions with high yields and stereoselectivity. All novel compounds were obtained in high purity without the need for chromatography stages. Different functional
Microwave-assisted synthesis of the (E)-α-methylalkenoate framework from multifunctionalized allylic phosphonium salts
作者:Lidiane Meier、Misael Ferreira、Marcus M. Sá
DOI:10.1002/hc.21001
日期:——
A convenient and general microwave-assisted method for the synthesis of stereochemicallydefined α-methylalkenoic acids and esters from allylic phosphonium salts in a basic aqueous medium is described. A selective preparation of acids or esters was dependent on the base (NaOH or NaHCO3) employed in the reaction and could be achieved with good to excellent yields under mild conditions in the absence
Synthesis and biological evaluation of novel 2-alkoxycarbonylallylester phosphonium derivatives as potential anticancer agents
作者:Zachary S. Gardner、Tanner J. Schumacher、Conor T. Ronayne、Greeshma P. Kumpati、Michael J. Williams、Akira Yoshimura、Hithardha Palle、Chinnadurai Mani、Jon Rumbley、Venkatram R. Mereddy
DOI:10.1016/j.bmcl.2021.128136
日期:2021.8
allyl bromides and aryl phosphines as mitochondria targeting anticanceragents. In vitro cell proliferation inhibition studies on various solid tumor cell lines indicate that most of the compounds exhibit IC50 values in µM concentrations. Further studies reveal that β-substituted BH bromide derived phosphonium derivatives enhance the biological activity to low µM IC50 values. In vitro metabolic studies
已经从 Baylis-Hillman (BH) 反应衍生的烯丙基溴和芳基膦合成了几种鏻衍生物作为靶向抗癌剂的线粒体。对各种实体肿瘤细胞系的体外细胞增殖抑制研究表明,大多数化合物在 μM 浓度下表现出 IC 50值。进一步的研究表明,β-取代的 BH 溴化物衍生的鏻衍生物将生物活性提高到低 µM IC 50值。体外 代谢研究表明,先导候选化合物16 抑制线粒体 ATP 的产生,增加线粒体膜内的质子泄漏,并以浓度依赖性方式消除备用呼吸能力。
Synthesis of Enantiomerically Pure 3-Amino-2-methylenealkanoates (Aza-Morita-Baylis-Hillman Adducts) Mediated by Cinchona Alkaloids
作者:Gianluca Martelli、Mario Orena、Samuele Rinaldi
DOI:10.1002/ejoc.201101244
日期:2011.12
reacted with (S)-1-(4-methoxyphenyl)ethylamine in the presence of astoichiometric amount of quinidine to yield (R)-3-[(tert-butoxycarbonyl)amino]-2-methylenealkanoates (aza-Morita–Baylis–Hillmanadducts) in enantiomericallypure form.
?-Methylidene- and ?-Alkylidene-?-lactams from Nonproteinogenic Amino Acids
作者:Rainer Buchholz、H. Martin R. Hoffmann
DOI:10.1002/hlca.19910740608
日期:1991.9.18
Treatment of methyl 2-(1-hydroxyalkyl)prop-2-enoates 1 with conc. HBr solution afforded methyl (Z)-2-(bromomethyl)alk-2-enoates 2, which were transformed regioselectively into N-substituted methyl (E)-2- (aminomethyl)alk-2-enoates 3 (SN2 reaction) and into N-substituted methyl 2-(1-aminoalkyl)prop-2-enoates 4(SN2′ reaction). Regiocontrol of nucleophilic attack by amine was accomplished simply by choice
用浓溶液处理2-(1-羟烷基)丙-2-烯酸甲酯1。用HBr溶液得到(Z)-2-(溴甲基)烷-2-烯酸甲酯2,将其区域选择性地转化成N-取代的甲基(E)-2-(氨甲基)烷-2-烯酸酯3(S N 2反应)并进入ñ取代的甲基2-(1-氨基烷基)丙-2- enoates 4(S ñ 2'反应)。胺对亲核性攻击的区域控制仅通过选择溶剂即可完成,S N 2反应发生在MeCN和S N中。在石油醚中进行2'反应。水解和内酰胺化分别得到β-内酰胺7和8,分别在C(3)处含有外环亚烷基和亚甲基。