Enantioselective and Diastereoselective Construction of Chiral Amino Alcohols by Iridium–f-Amphox-Catalyzed Asymmetric Hydrogenation via Dynamic Kinetic Resolution
The iridium–f-amphox-catalyzed asymmetric hydrogenation of racemic α-amino β-unfunctionalized ketones proceeds via a DKR (dynamickineticresolution) process for the construction of various chiral N,N-disubstituted α-amino β-unfunctionalized alcohols in quantitative yields with excellent enantioselectivities and diastereoselectivities (all products >99% ee and >99:1 dr, TON up to 100 000). Importantly
ANALOGS OF EPHEDRINE AND ADRENALINE CONTAINING THE MORPHOLINE NUCLEUS AND SOME OF THEIR ESTERS
作者:NATHAN RUBIN、ALLAN R. DAY
DOI:10.1021/jo01207a007
日期:1940.1
Synthese et stereochimie de formation d'amines tertiaires β-fluorees par fluoration d'aminoalcools avec la trifluro-1,1,2 chloro-2 N,N-diethyl ethylamine (FAR) et le melange HF - pyridine.
作者:S. Hamman、C.G. Beguin、C. Charlon、C. Luu-Duc
DOI:10.1016/s0022-1139(00)81971-5
日期:1987.12
The fluorination of amino-alcohols giving tertiary β-fluoroamines was studied synthetically and stereochemically. Configuration of initial and final products were assigned using 1H and 19F NMR. The fluorination of amino-alcohols with FAR is a stereospecific reaction with retention of configuration. Isomerically or optically pure compounds can be obtained. The fluorination with HF - pyridine mixture
合成和立体化学研究了氨基醇的氟化,生成叔β-氟胺。初始和最终产物的构型使用1 H和19 F NMR进行分配。氨基醇与FAR的氟化反应是立体定向反应,保留了构型。可以得到异构或光学纯的化合物。用HF-吡啶混合物氟化可优先得到苏式氟胺。