research on diverse C-20 decorated derivatives of camptothecin (CPT), 46 new CPT acylthiourea derivatives were synthesized and evaluated in vitro for their cytotoxicity. All the compounds showed promising in vitro cytotoxicity against six tumor cell lines (Hep3B, MCF7, A549, MDA-MB-231, KB and KB-vin). Out of them, compound c20 possesses remarkable in vitro cytotoxic activity and is more potent than topotecan
Chemoselective transfer hydrogenation of nitroarenes, ketones and aldehydes using acylthiourea based Ru(II)(p-cymene) complexes as precatalysts
作者:Pushpanathan N. Sathishkumar、Neethi Raveendran、Nattamai S.P. Bhuvanesh、Ramasamy Karvembu
DOI:10.1016/j.jorganchem.2018.08.006
日期:2018.12
Ru(II)(η6-p-cymene) complexes (1–5) were proved to be efficient precatalysts for the transferhydrogenation of carbonyl compounds and nitroarenes in the presence of 2-propanol as a hydrogen donor and KOH as a base. The catalytic transferhydrogenation reactions were chemoselective towards the nitro group in presence of carbonyl group, which is a rare scenario in homogeneous catalysis. The catalyst was
一系列新的Ru(II)(η 6 - p -cymene)配合物(1 - 5)从基于吡啶酰基硫脲配位体合成(L 1 -L 5)和[茹(η 6 - p -cymene)氯2 ] 2。通过UV-可见,FT-IR,质量以及1 H和13 C NMR光谱技术对所有的配体和配合物进行了很好的表征。配体(L 1,L 2,L 4和L 5)和配合物1的分子结构用单晶X射线衍射研究证实。钌(II)(η 6 - p -cymene)复合物(1-5)被证明是羰基化合物和硝基芳烃的在2-丙醇的存在作为氢供体和KOH作为碱的转移氢化高效预催化剂。催化转移氢化反应在羰基存在下对硝基具有化学选择性,这在均相催化中是罕见的情况。该催化剂与包括糠醛,醌和许多杂环在内的多种底物相容。催化反应显示出非常高的转化率(最高100%)和极好的收率(最高99%)。发现周转数字(TON)直至990。
A cascade synthesis of<i>S</i>-allyl benzoylcarbamothioates<i>via</i>Mumm-type rearrangement
作者:Anjali Dahiya、Wajid Ali、Tipu Alam、Bhisma K. Patel
DOI:10.1039/c8ob02293c
日期:——
A cascade synthesis ofS-allyl benzoylcarbamothioates has been achieved from Morita Baylis Hillman alcohols and aroyl isothiocyanatesviaMumm-type rearrangement.
Design, Synthesis, and Insecticidal Activity of Novel Doramectin Derivatives Containing Acylurea and Acylthiourea Based on Hydrogen Bonding
作者:Qi Zhang、Yao Cheng、Cheng Zheng、Ping Bai、Jian Yang、Xiaoxia Lu
DOI:10.1021/acs.jafc.0c00230
日期:2020.5.27
investigation on the insecticidalactivities of several doramectin derivatives preliminarily revealed that the presence of hydrogen bonds at the C4″ position of the molecule with target protein γ-aminobutyric acid (GABA) receptor was crucial for retaining high insecticidalactivity. As a continuation of our research work on the development of new insecticides, two series of novel acylurea and acylthiourea