Reactions of Azidoacetate Enolates with Aromatic Aldehydes: Preparation of N-BOC 3-Arylserines
作者:Graham Geen、Christopher J. Shaw、J. B. Sweeney
DOI:10.1055/s-1999-2854
日期:1999.9
Azidoacetates undergo aldol-like reaction with aromatic aldehydes in the presence of sub-stoichiometric amounts of NaOEt. The product azido alcohols (2a)-(2q) may be directly converted to N-BOC phenyl serine analogues
The use of asymmetrictransferhydrogenation combined with dynamic kinetic resolution for the synthesis of β-hydroxy-α-(tert-butoxycarbonyl)amino esters in water is described. This procedure provides the desired amino alcohols in good yields, diastereoselectivities, and enantioselectivities. A surfactant is employed to achieve good yields due to the hydrophobic nature of both the catalyst and substrate
The asymmetric transfer hydrogenation of alpha-amido-beta-keto esters to provide the corresponding anti-beta-hydroxy-alpha-amido esters in good to excellent yields, diastereoselectivity, and enantioselectivity is reported. The procedure is operationally simple, and delicate handling of the catalyst is not necessary.