1859-41-2Relevant academic research and scientific papers
Design and synthesis of HDAC inhibitors to enhance the therapeutic effect of diffuse large B-cell lymphoma by improving metabolic stability and pharmacokinetic characteristics
Cui, Hao,Hong, Qianqian,Wei, Ran,Li, Hongmei,Wan, Chunyang,Chen, Xin,Zhao, Shuang,Bu, Haizhi,Zhang, Bingxu,Yang, Dexiao,Lu, Tao,Chen, Yadong,Zhu, Yong
, (2021/12/27)
Histone deacetylases (HDAC) are clinically validated and attractive epigenetic drug targets for human cancers. Several HDAC inhibitors have been approved for cancer treatment to date, however, clinical applications have been limited due to the poor pharmacokinetics, bioavailability, selectivity of the HDAC inhibitors and most of them need to be combined with other drugs to achieve better results. Here, we describe our efforts toward the discovery of a novel series of lactam-based derivatives as selective HDAC inhibitors. Intensive structural modifications lead to the identification of compound 24g as the most active Class I HDAC Inhibitor, along with satisfactory metabolic stability in vitro (t1/2, human = 797 min) and the desirable oral bioavailability (F = 92%). More importantly, compound 24g showed good antitumor efficacy in a TMD-8 xenograft model (TGI = 77%) without obvious toxicity. These results indicated that Class I HDAC Inhibitor could be potentially used to treat certain diffuse large B-cell lymphoma therapeutics.
Natural α-methylenelactam analogues: Design, synthesis and evaluation of α-alkenyl-γ and δ-lactams as potential antifungal agents against Colletotrichum orbiculare
Delong, Wang,Lanying, Wang,Yongling, Wu,Shuang, Song,Juntao, Feng,Xing, Zhang
, p. 286 - 307 (2017/03/09)
In our continued efforts to improve the potential utility of the α-methylene-γ-lactone scaffold, 62 new and 59 known natural α-methylenelactam analogues including α-methylene-γ-lactams, α-arylidene-γ and δ-lactams, and 3-arylideneindolin-2-ones were synthesized as the bioisosteric analogues of the α-methylenelactone scaffold. The results of antifungal and cytotoxic activity indicated that among these derivatives compound (E)-1-(2, 6-dichlorobenzyl)-3-(2-fluorobenzylidene) pyrrolidin-2-one (Py51) possessed good selectivity with the highest antifungal activity against Colletotrichum orbiculare with IC50?=?10.4?μM but less cytotoxic activity with IC50?=?141.2?μM (against HepG2 cell line) and 161.2?μM (against human hepatic L02?cell line). Ultrastructural change studies performed by transmission electron microscope showed that Py51 could cause important cell morphological changes in C.?orbiculare, such as plasma membrane detached from cell wall, cell wall thickening, mitochondria disruption, a dramatic increase in vacuolation, and eventually a complete loss in the integrity of organelles. Significantly, mitochondria appeared one of the primary targets, as confirmed by their remarkably aberrant morphological changes. Analysis of structure–activity relationships revealed that incorporation of the aryl group into the α-exo-methylene and the N-benzyl substitution increased the activity. Meanwhile, the α-arylidene-γ-lactams have superiority in selectivity over the 3-arylideneindolin-2-ones. Based on the results, the N-benzyl substituted α-(2-fluorophenyl)-γ-lactam was identified as the most promising natural-based scaffold for further discovering and developing improved crop-protection agents.
SpinPhox/iridium(I)-catalyzed asymmetric hydrogenation of cyclic α-alkylidene carbonyl compounds
Liu, Xu,Han, Zhaobin,Wang, Zheng,Ding, Kuiling
supporting information, p. 1978 - 1982 (2014/03/21)
Optically active medium-sized cyclic carbonyl compounds bearing an α-chiral carbon center are of interest in pharmaceutical sciences and asymmetric synthesis. Herein, SpinPhox/IrI catalysts have been demonstrated to be highly enantioselective in the asymmetric hydrogenation of the Ci￡C bonds in the exocyclic α,β-unsaturated cyclic carbonyls, including a broad range of α-alkylidene lactams, unsaturated cyclic ketones, and lactones. It is noteworthy that the procedure can be successfully used in the asymmetric hydrogenation of the challenging α-alkylidenelactam substrates with six- or seven-membered rings, thus affording the corresponding optically active carbonyl compounds with an α-chiral carbon center in generally excellent enantiomeric excesses (up to 98 % ee). Synthetic utility of the protocol has also been demonstrated in the asymmetric synthesis of the anti-inflammatory drug loxoprofen and its analogue, as well as biologically important ε-aminocaproic acid derivatives. Take it for a spin: SpinPhox/IrI complexes are highly efficient and versatile in the enantioselective hydrogenation of a broad spectrum of exocyclic α,β-unsaturated carbonyl compounds, especially the challenging α-alkylidene lactam substrates with six- or seven-membered rings. The synthetic utility of the present protocol is demonstrated in the asymmetric synthesis of biologically important loxoprofen and ε-aminocaproic acid derivatives. Copyright
Iridium-catalyzed highly enantioselective hydrogenation of exocyclic α,β-unsaturated carbonyl compounds
Tian, Fengtao,Yao, Dongmei,Liu, Yuanyuan,Xie, Fang,Zhang, Wanbin
supporting information; experimental part, p. 1841 - 1845 (2010/10/21)
By using the iridium complex of a phosphine-oxazoline ligand with an axis-unfixed biphenyl backbone, a highly enantioselective hydrogenation of the C=C bond of exocyclic α,β-unsaturated carbonyl compounds to afford α-chiral cyclic ketones, lactones and lactams was developed.
Wittig-Horner synthesis of N-acyl-?±-ylidene-?3-aminobutyrates and of 3- ylidene-2-pyrrolidones
Stamm,Baumann
, p. 885 - 888 (2007/10/03)
Wittig-Homer reaction of benzaldehyde and of ketones with recently described diethyl ?3-amido-?±-ethoxycarbonyl-phosphonates provides the title esters and/or the title pyrrolidones, namely both E- and Z-isomers from unsymmetrical carbonyl components. Ylidenpyrrolidones are directly and without by-products obtained from the recently described diethyl 1- ethoxycarbonyl-2-pyrrolidone-3-phosphonate.
Synthesis of substituted α-methylene lactams by rhodium catalysed carbonylation of acetylenic amines
Campi,Chong,Jackson,Van Der Schoot
, p. 2533 - 2542 (2007/10/02)
Reactions of γ- and β-aminoalkynes, (2) and (5) with hydrogen and carbon monoxide in the presence of rhodium catalysts give substituted α-methylene-2-piperidinones (7) and 2-pyrrolidinones (11).
