Efficient photoactivation of a Diels-Alderase ribozyme
作者:Alexander Nierth、Marco Singer、Andres Jäschke
DOI:10.1039/c0cc03162c
日期:——
Here we report the first example of a photoactivatable ribozyme which catalyzes a bimolecular reaction of two small organic molecules with multiple turnover, under control of a photo-cleavable protecting group by exploiting the structural significance of a single hydrogen bond.
Synthesis and Characterization of Nitroaromatic Peptoids: Fine Tuning Peptoid Secondary Structure through Monomer Position and Functionality
作者:Sarah A. Fowler、Rinrada Luechapanichkul、Helen E. Blackwell
DOI:10.1021/jo8023363
日期:2009.2.20
position stabilized the threaded loop structure relative to (Nspe)9. Additional experiments revealed that nitroaromatic side chains can influence peptoid nonamer folding by modulating the strength of key intramolecular hydrogen bonds in the peptoid threaded loop structure. Steric interactions were also implicated for the Ns2ne monomer. Overall, this study provides further evidence that aromatic side-chain
N-取代的甘氨酸寡聚体或拟肽已成为一类重要的折叠体,用于研究生物分子相互作用和作为治疗剂的潜在用途。然而,设计具有先验明确构象的拟肽仍然是一项艰巨的挑战。需要新的方法来解决这个问题,系统研究单个单体单元在全球 peptoid 折叠过程中的作用代表了一种策略。在这里,我们通过设计、合成和表征含有硝基芳族单体单元的拟肽来报告我们对这种方法的努力。这项工作需要合成一种新的手性胺结构单元(S)-1-(2-硝基苯基)乙胺 (s2ne),可以使用标准固相类肽合成技术轻松安装到类肽中。我们设计了一系列拟肽九聚体,使我们能够探测这种相对缺电子和空间位阻的 α-手性侧链对拟肽结构的影响,即拟肽螺纹环和螺旋。拟肽的圆二色光谱表明硝基芳香单体对拟肽的二级结构有显着影响。具体来说,螺纹环结构在包含交替的N -( S )-1-苯乙基甘氨酸( N spe ) 和N s2ne 单体的九聚体中被破坏,主要构象是螺旋形的。确实,放置单个(
[EN] IMPROVED PROCESS FOR THE PREPARATION OF OZANIMOD Α-AMINO COMPOUND<br/>[FR] PROCÉDÉ AMÉLIORÉ POUR LA PRÉPARATION D'UN COMPOSÉ A-AMINO D'AZANIMOD
申请人:SUVEN LIFE SCIENCES LTD
公开号:WO2019058290A1
公开(公告)日:2019-03-28
The present invention relates to an improved process for the preparation of optically chiral amino compound. The present invention particularly relates to the improved process for the preparation of (S)-1-amino-2,3-dihydro-1H-indene-4-carbonitrile, an important intermediate for the synthesis of ozanimod. The present invention more particularly relates to preparation of (S)-1-amino-2,3-dihydro-1H-indene-4- carbonitrile using 4-cyano-1-indanone and α-methylbenzylamine derivatives as starting materials. The present invention specifically relates to preparation of (S)-1- amino-2,3-dihydro-1H-indene-4-carbonitrile comprising diastereoselective chiral amine synthesis by protection with chiral auxiliary -methyl benzylamine derivatives followed by reduction and debenzylation.
Discovery and Structural Modification of 1-Phenyl-3-(1-phenylethyl)urea Derivatives as Inhibitors of Complement
作者:Mei Zhang、Xiao-Ying Yang、Wei Tang、Tom W. L. Groeneveld、Pei-Lan He、Feng-Hua Zhu、Jia Li、Wei Lu、Anna M. Blom、Jian-Ping Zuo、Fa-Jun Nan
DOI:10.1021/ml300005w
日期:2012.4.12
A series of 1-phenyl-3-(1-phenylethyl)urea derivatives were identified as novel and potent complement inhibitors through structural modification of the original compound from high-throughput screening. Various analogues (7 and 13-15) were synthesized and identified as complement inhibitors, with the introduction of a five- or six-carbon chain (7c, 7d, 7k, 7I, and 7o) greatly improving their activity. Optimized compound 7I has an excellent inhibition activity with IC50 values as low as 13 nM. We demonstrated that the compound 7I inhibited C9 deposition through the classical, the lectin, and the alternative pathways but had no influence on C3 and C4 depositions.