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。
A phenacrylate scaffold for tunable thiol activation and release
作者:Rathinam K. Sankar、Rohan S. Kumbhare、Allimuthu T. Dharmaraja、Harinath Chakrapani
DOI:10.1039/c4cc07343f
日期:——
A scaffold for biological thiol mediated tunable activation and release of a cargo is reported.
Formal [3+2] Annulation Involving Allylic Bromides and Thioureas. Synthesis of 2-Iminothiazolidines through a Base-Catalyzed Intramolecular<i>anti</i>-Michael Addition
作者:Misael Ferreira、Marcus M. Sá
DOI:10.1002/adsc.201401026
日期:2015.3.9
A simple and efficient protocol was developed for the synthesis of 2‐iminothiazolidines through a base‐mediated [3+2] annulation involving substituted thioureas and allylic bromides bearing electron‐withdrawing groups. This domino process consists of nucleophilic displacement, followed by intramolecular anti‐Michael addition of the preformed allylic isothiourea under mild conditions to give the thiazolidine
Alkylthialactonization: A novel protocol for access to either diastereoisomer of α-(thiomethyl)-γ-butyrolactones
作者:Daniel R. Nicponski、P. Veeraraghavan Ramachandran
DOI:10.1016/j.tetlet.2023.154605
日期:2023.7
Presented herein are the first highly diastereoselective, controlled alkylthia-Michael reactions of mercaptans onto α-methylene butanoates. This addition occurs with concomitant lactonization and provides ready access to either the kinetic cis,cis- or thermodynamic cis,trans-butyrolactones under catalytic promotion by tetrabutylammonium hydroxide in methanol.