Peptide ligation by chemoselective aminonitrile coupling in water
作者:Pierre Canavelli、Saidul Islam、Matthew W. Powner
DOI:10.1038/s41586-019-1371-4
日期:2019.7
N-to-C peptide ligation. Our model unites prebiotic aminonitrile synthesis and biological α-peptides, suggesting that short N-acyl peptide nitriles were plausible substrates during early evolution.Prebiotic peptide formation is achieved through chemoselective, high-yielding ligation of α-aminonitriles in water, showing selectivity for α-peptide coupling and tolerance of all proteinogenic amino acid residues
Cyclization via Carbolithiation of α-Amino Alkyllithium Reagents
作者:Robert J. Bahde、Scott D. Rychnovsky
DOI:10.1021/ol801523r
日期:2008.9.18
We report a newroute to tertiary alpha-amino stereocenters by sequential alkylation of alpha-amino nitriles followed by reductive lithiation of the nitrile and cyclization onto an alkene. Reductive lithiation of alpha-amino nitriles using lithium 4,4'-di-tert-butylbiphenylide (LiDBB) and subsequent intramolecular carbolithiation proceeded with modest to high diastereoselectivity to deliver cyclic
Photoredox-Catalyzed C<sub>α</sub>–H Cyanation of Unactivated Secondary and Tertiary Aliphatic Amines: Late-Stage Functionalization and Mechanistic Studies
作者:Ozgur Yilmaz、Martins S. Oderinde、Marion H. Emmert
DOI:10.1021/acs.joc.8b01700
日期:2018.9.21
general, high-yielding amine Cα–H cyanation protocol via photoredox catalysis. Inexpensive NaCN is employed as the cyanidesource and air is the external oxidant, resulting in mild and highly functional group tolerant conditions. Notably, efficient Cα–H cyanations of secondary and tertiary aliphatic amines and of complex, biologically active compounds (drugs) can be performed using the established methodology
[EN] NEW SELECTIVE MODULATORS OF INSECT NICOTINIC ACETYLCHOLINE RECEPTORS<br/>[FR] NOUVEAUX MODULATEURS SÉLECTIFS DES RÉCEPTEURS NICOTINIQUES DE L'ACÉTYLCHOLINE D'INSECTES
申请人:UNIV NANTES
公开号:WO2020094754A1
公开(公告)日:2020-05-14
The present invention relates to a compound having the following formula (I): wherein: - A is a (hetero)aryl radical comprising from 5 to 10 carbon atoms, possibly substituted by at least one substituent chosen from the group consisting of: halogen atoms, amino, azido, cyano, nitro, hydroxyl, formyl, carboxyl, amido, (C1-C6)alkyl groups, halo(C1-C6)alkyl groups, (C1-C6)alkoxy groups, alkenyl groups, cycloalkenyl groups, and alkynyl groups, and - R is H, CN or CF3, or their pharmaceutically acceptable salts, racemates, diastereomers or enantiomers.
A Five-Step Synthesis of (±)-Tylophorine via a Nitrile-Stabilized Ammonium Ylide
作者:Günther Lahm、Alexander Stoye、Till Opatz
DOI:10.1021/jo3011045
日期:2012.8.3
The Stevens rearrangement of a nitrile-stabilized ammonium ylide is the key step of a very short and practical synthesis of the phenanthroindolizine alkaloid (±)-tylophorine. The method requires only five linear steps and is devoid of any protecting group manipulations.