这项工作描述了生物碱倍半酰胺的完整合成和九个结构类似物的简明文库,旨在评估它们对乳腺癌细胞系MDA-MB-231的评价。在一组七个乳腺癌细胞系和两个非致瘤细胞系中也评估了最有前途的化合物(3; IC 50 = 6.6μM)。我们进一步对类似物3的作用机理进行了初步研究,与Cenocladamide相比,该类似物3没有内环双键。本研究提出了具有令人感兴趣的细胞毒性活性的倍生酰胺类似物的发现,这对于进一步优化用于乳腺癌治疗的新化学治疗剂可能是有用的。
Design, Synthesis, and Pharmacological Characterization of a Neutral, Non-Prodrug Thrombin Inhibitor with Good Oral Pharmacokinetics
作者:Alexander Hillisch、Kersten M. Gericke、Swen Allerheiligen、Susanne Roehrig、Martina Schaefer、Adrian Tersteegen、Simone Schulz、Philip Lienau、Mark Gnoth、Vera Puetter、Roman C. Hillig、Stefan Heitmeier
DOI:10.1021/acs.jmedchem.0c01035
日期:2020.11.12
Despite extensive research on small molecule thrombininhibitors for oral application in the past decades, only a single double prodrug with very modest oral bioavailability has reached human therapy as a marketed drug. We have undertaken major efforts to identify neutral, non-prodrug inhibitors. Using a holistic analysis of all available internal data, we were able to build computational models and
Enantioselective allene/enone photocycloadditions: The use of an inexpensive optically active 1,3-disubstituted allene
作者:Mary S. Shepard、Erick M. Carreira
DOI:10.1016/s0040-4020(97)01013-2
日期:1997.12
and use of an inexpensive readily prepared opticallyactive 1,3-disubstituted allene that may be utilized for enantioselective intramolecular allene/enone photocycloadditions. In addition, we describe novel substrates for intramolecular [2+2] photocycloadditions which substantially expand the scope of the process to include amino- and thio- tethered allene/enones.
A catalytic amount of trimethylsilyl triflate (TMSOTf) remarkably facilitates the selectiveconjugateaddition of a variety of silyl phosphites, prepared in situ from dialkyl phosphites and N,O-bis(trimethylsilyl)acetamide, to cyclic enones giving 1,4-adducts in high yields.
According to the invention there is provided a antibacterial cephalosporin derivative of the formula: ##STR1## in which X is sulphur, oxygen, methylene or sulphinyl; R3 is hydrogen or methoxy; R1 and R2 are known in the cephalosporin art and R4 is an aminomethyl group in which the amino group carries one of various positively charged nitrogen-containing species set out in the specification and optionally a further substituent selected from hydrogen, lower alkyl, benzyl or heteroarylloweralkyl groups.
Synthesis and antibacterial activity of the metabolites of 9-fluoro-6,7-dihydro-8-(4-hydroxy-1-piperidyl)-5-methyl-1-oxo-1H,5H-benzo(i, j)quinolizine-2-carboxylic acid (OPC-7251).
The metabolites of 9-fluoro-6, 7-dihydro-8-(4-hydroxy-1-piperidyl)-5-methyl-1-oxo-1H, 5H-benzo[i, j]quinolizine-2-carboxylic acid (OPC-7251) (1), which has a potent antiabacterial activity against gram-positive bacteria, characteristically Propionibacterium acnes, were synthesized to confirm their structures and to examine their antibacterial activity. The structures of three major metabolites (2, 3a and 4) were identified by means of comparison with the synthetic compounds. The antibacterial activity of the metabolites (2, 3a and 4) was found to be lower than that of 1.