[EN] PREPARATION OF PROTECTED ALPHA-KETO BETA-AMINO ESTERS AND AMIDES<br/>[FR] PRÉPARATION D'ESTERS ET D'AMIDES D'ALPHA-CÉTO-BÊTA-AMINO PROTÉGÉS
申请人:VERTEX PHARMA
公开号:WO2010002474A1
公开(公告)日:2010-01-07
The invention provides β-sulfonamide α-keto esters and amides in which the α-keto is protected as a 1,3-dithiolane derivative. Also provided are methods for preparing such esters and amides and for incorporating them into peptides.
Preparation of Protected Alpha-Keto Beta-Amino Esters and Amides
申请人:Nugent William A.
公开号:US20110213161A1
公开(公告)日:2011-09-01
The invention provides β-sulfonamide α-keto esters and amides in which the α-keto is protected as a 1,3-dithiolane derivative. Also provided are methods for preparing such esters and amides and for incorporating them into peptides.
Preparation of protected alpha-keto beta-amino esters and amides
申请人:Nugent William A.
公开号:US08378124B2
公开(公告)日:2013-02-19
The invention provides β-sulfonamide α-keto esters and amides in which the α-keto is protected as a 1,3-dithiolane derivative. Also provided are methods for preparing such esters and amides and for incorporating them into peptides.
PREPARATION OF PROTECTED ALPHA-KETO BETA-AMINO ESTERS AND AMIDES
申请人:VERTEX PHAMACEUTICALS INCORPORATED
公开号:US20130131356A1
公开(公告)日:2013-05-23
The invention provides β-sulfonamide α-keto esters and amides in which the α-keto is protected as a 1,3-dithiolane derivative. Also provided are methods for preparing such esters and amides and for incorporating them into peptides.
Beyond the chiral pool: a general approach to β-amino-α-keto amides
作者:Cristian L. Harrison、Mariusz Krawiec、Raymond E. Forslund、William A. Nugent
DOI:10.1016/j.tet.2010.11.018
日期:2011.1
A simple route was developed for the synthesis of optically enriched beta-amino-alpha-keto amides. The highly diastereoselective addition of alkyl dithiolanecarboxylates to optically enriched sulfinimines affords the corresponding beta-amino-alpha-keto esters in which the ketone carbonyl group is protected as a dithiolane. Amidation of the ester functionality with a primary amine proceeds readily at room temperature. Treatment with HCl cleaves the N-S bond of the sulfinyl group to provide a free amine functionality, which can then be incorporated into a peptide. Removal of the dithiolane protecting group under oxidative conditions proceeds without epimerization as exemplified by a model dipeptide. (C) 2010 Elsevier Ltd. All rights reserved.