Conformational and Chiroptical Properties of N-Nitrosoazetidines
摘要:
Optically active N-nitrosoazetidines, containing the isolated nitrosoazetidine chromophore, i.e. (2R)-1-nitroso-2-methylazetidine (2) and (4S)-1-nitroso-2,2-dibutyl-4-methylazetidine (5), are synthesized, and their H-1 NMR, CD, and UV spectra are studied. A topomerization mechanism, structural features, and chiroptical properties of the individual isomers of the parent 1-nitrosoazetidine (1) and its (2R)-2-methyl, (4R)-2,2,4-trimethyl, and (4S)-2,2-diethyl-4-methyl derivatives 2-4 are studied theoretically by means of non-empirical quantum chemical calculations. It is shown that the CD spectra of N-nitrosoazetidines can be interpreted on the basis of the two-position Z,E-equilibrium, taking into account the nonplanarity of the nitrosoazetidine chromophore. The Cotton effect sign of the n-pi* transition at 380 nm is determined by the intrinsic chirality of the chromophore and obeys a spiral rule.
[EN] GCN2 INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS DE GCN2 ET LEURS UTILISATIONS
申请人:MERCK PATENT GMBH
公开号:WO2019148132A1
公开(公告)日:2019-08-01
The present invention provides compounds, compositions thereof, and methods of using the same.
本发明提供了化合物、其组合物以及使用它们的方法。
From Amino Acids to Enantiopure Bicyclic Isoxazolidinylpyridin-4(1H)-ones through Intramolecular Nitrone Cycloadditions
作者:Roberto Romeo、Daniela Iannazzo、Anna Piperno、Maria A. Chiacchio、Antonino Corsaro、Antonio Rescifina
DOI:10.1002/ejoc.200400847
日期:2005.6
Homochiral bicyclicisoxazolidinylpyridin-4(1H)-ones have been synthesised by an intramolecularnitronecycloaddition process, starting from homochiral β-amino acids. Stereoselection at C2 or C3 of the acyclic substrate appears to give the best results in the control of the stereochemistry of the new formed chiral centres. The synthetic approach has been further directed towards functionalised piperidones
The present invention provides compounds inhibiting General amino acid Control Non-derepressible 2 kinase (“GCN2”), compositions thereof, and methods of using the same for treating various disorders, such as cancer.