Probing α‐Amino Aldehydes as Weakly Acidic Pronucleophiles: Direct Access to Quaternary α‐Amino Aldehydes by an Enantioselective Michael Addition Catalyzed by Brønsted Bases
The high tendency of α‐amino aldehydes to undergo 1,2‐additions and their relatively low stability under basic conditions have largely prevented their use as pronucleophiles in the realm of asymmetric catalysis, particularly for the production of quaternary α‐amino aldehydes. Herein, it is demonstrated that the chemistry of α‐amino aldehydes may be expanded beyond these limits by documenting the first
[EN] PROCESSES AND INTERMEDIATES FOR PREPARING STERIC COMPOUNDS<br/>[FR] PROCÉDÉS ET INTERMÉDIAIRES POUR LA SYNTHÈSE DE COMPOSÉS STÉRIQUES
申请人:VERTEX PHARMA
公开号:WO2007109023A1
公开(公告)日:2007-09-27
[EN] This invention relates to processes and intermediates for the preparation of an alpha- amino beta-hydroxy acid of Formula (1) wherein the variables R1 R'1 and R2 are defined herein and the compound of Formula (1) has an enantiomeric excess (ee) of 55% or greater. [FR] La présente invention concerne des procédés et des intermédiaires pour la synthèse d'un alpha-amino-bêta-hydroxyacide de formule (1) où les variables R1, R'1 et R2 sont telles que définies dans la présente invention, le composé de formule (1) présentant un excès énantiomérique (ee) supérieur ou égal à 55 %.