Whole cell catalysed kinetic resolution of 6-azabicyclo[3.2.0]hept-3-en-7-one: synthesis of (–)-cispentacin (FR 109615)
摘要:
Enantioselective hydrolysis of the beta-lactam (+/-)-2 using Rhodococcus equi provided (1R,5S)-6-azabicyclo[3.2.0]hept-3-en-7-one (+)-2, a precursor of the antifungal agent cispentacin.
Azabicyclic compounds are central nervous system active agents
申请人:——
公开号:US20040044029A1
公开(公告)日:2004-03-04
Compounds of formula (I)
1
are novel CNS active agents that are useful for treating pain and for treating other disorders associated with the cholinergic system.
Alicyclic β- and γ-Amino Acids: Useful Scaffolds for the Stereocontrolled Access to Amino Acid-Based Carbocyclic Nucleoside Analogs
作者:Attila Márió Remete、Loránd Kiss
DOI:10.3390/molecules24010161
日期:——
Stereocontrolled synthesis of some amino acid-based carbocyclicnucleosideanalogs containing ring C=C bond has been performed on β- and γ-lactam basis. Key steps were N-arylation of readily available β- or γ-lactam-derived amino ester isomers and amino alcohols with 5-amino-4,6-dichloropyrimidine; ring closure of the formed adduct with HC(OMe)₃ and nucleophilic displacement of chlorine with various
available cyclodienes. The stereocontrolled synthetic concept was based on the oxidative ring cleavage of unsaturated cyclic β-amino acids derived from cycloalkadiene, followed by ring closing with double reductive amination, which furnished some conformationally restricted β-amino acid derivatives with a piperidine or azepane core.
Structural Diversity‐Oriented Synthesis of Orthogonally Protected Cyclic Amino Acid Derivatives with Multiple Stereogenic Centers
作者:Melinda Nonn、Attila M. Remete、Loránd Kiss
DOI:10.1002/hlca.202000090
日期:2020.7
The synthesis of three‐dimensional cyclopentane amino acid derivatives with multiple stereocenters and with high regiochemical and diastereochemical diversity has been achieved starting from cyclopentadiene‐derived β‐aminocyclopentenecarboxylic acid. The small‐molecular design was based on stereo‐ and regiocontrolled functionalization of the starting cyclopentene β‐amino acid through stereoselective
Intramolecular carbolithiation reactions for the preparation of 3-alkenylpyrrolidines
作者:Iain Coldham、Kathy N. Price、Richard E. Rathmell
DOI:10.1039/b303670g
日期:——
Tin–lithium exchange allows the formation of α-amino-organolithium species that undergo anionic cyclization onto allylic ethers to give 3-alkenylpyrrolidines. The methodology has been applied to the synthesis of an advanced intermediate related to the natural product (–)-α-kainic acid.