Parallel Kinetic Resolution of Acyclic γ-Amino-α,β-unsaturated Esters: Application to the Asymmetric Synthesis of 4-Aminopyrrolidin-2-ones
摘要:
Conjugate addition of a 50:50 pseudoenantiomeric mixture of lithium (R)-N-benzyl-N(alpha-methylbenzyl)amide and lithium (S)-N-3,4-dimethoxybenzyl-N-(alpha-methylbenzyl)amide to a range of racemic acyclic gamma-amino-alpha,beta-unsaturated esters (derived from the corresponding a-amino acids) effects their efficient parallel kinetic resolution, allowing the preparation of enantiopure beta,gamma-diamino esters. The beta,gamma-dlamlno ester products of these reactions are readily converted into the corresponding substituted 4-aminopyrrolidin-2-ones via N-debenzylation and cyclization.
Chiral phosphine oxides and chiral esters in stereoselective intermolecular acylation reactions of phosphine oxides
作者:David Cavalla、Catherine Guéguen、Adam Nelson、Peter O'Brien、Matthew G Russell、Stuart Warren
DOI:10.1016/0040-4039(96)01612-7
日期:1996.10
Single diastereomers of β-keto phosphineoxides have been generated from intermolecular acylation of phosphineoxides using either chiral esters or chiral phoshine oxides. In most cases, reduction of the ketone products was not affected by the presence of extra chiral centres. Some mechanistic points of interest in the acylation reactions are discussed.
Synthesis of phenylalanine-derived β-hydroxy and β-keto phosphine oxides — investigation of the configurational stability of lithiated phosphine oxides using the hoffmann test
作者:Peter O'Brien、Stuart Warren
DOI:10.1016/0040-4039(96)00814-3
日期:1996.6
Reaction between a phenylalanine-derived aldehyde and a lithiatedphosphineoxide (the Hoffmann test) has been used to demonstrate that lithiatedphosphineoxides are not configurationally stable in THF at −78 °C on the timescale of thier reaction with the aldehyde. Additionally, these reactions generate synthetically useful products.
[EN] RETROVIRAL PROTEASE INHIBITING COMPOUNDS<br/>[FR] COMPOSES INHIBANT DES PROTEASES RETROVIRALES
申请人:ABBOTT LABORATORIES
公开号:WO1994014436A1
公开(公告)日:1994-07-07
(EN) A retroviral protease inhibiting compound of formula (A) is disclosed.(FR) L'invention se rapporte à un composé inhibant des protéases rétrovirales, qui est présenté par la formule (A).
Cellular accumulation of phosphonate analogs of hiv protease inhibitor compounds
申请人:Arimilli N. Murty
公开号:US20070010489A1
公开(公告)日:2007-01-11
Phosphonate substituted compounds with HIV protease inhibitory properties having use as therapeutics and for other industrial purposes are disclosed. The compositions inhibit 5 HIV protease activity and/or are useful therapeutically for the treatment of AIDS and other antiviral infections, as well as in assays for the detection of HIV protease.
This invention to provide a process for producing an optically active threo-phenylnorstatin derivative which does not require a toxic cyanating agent or a costly reagent, or a complicated procedure, and can be practiced on a commercial scale.
This invention is directed to a process for producing a β-amino-α-hydroxy acid derivative
which comprises treating either a γ-amino-β-keto sulfoxide derivative with a halogenating agent to produce a γ-amino-α-halo-β-keto sulfoxide derivative, treating the same with an acid and an alcohol to produce a β-amino-α-keto ester derivative or β-amino-α-keto acid derivative, and followed by reducing.