A chemoenzymatic synthesis of a series of 2-hydroxy-5-nitro-4-substituted esters is described that uses two biotransformations in a single-pot process in which a kinetic resolution/reduction occurs. The products are valuable intermediates for the preparation of 4-substituted prolines and 5-substituted 3-hydroxypiperidinones as illustrated by the preparation of (2R,4R)-4-methylproline and (3S,5R)-3-hydroxy-5-methylpiperidinone.
ANDRUSZKIEWICZ, RYSZARD;SILVERMAN, RICHARD B., SYNTHESIS,(1989) N2, C. 953-955
作者:ANDRUSZKIEWICZ, RYSZARD、SILVERMAN, RICHARD B.
DOI:——
日期:——
A Convenient Synthesis of 3-Alkyl-4-aminobutanoic Acids
作者:Ryszard Andruszkiewicz、Richard B. Silverman
DOI:10.1055/s-1989-27443
日期:——
A series of 3-alkyl-4-aminobutanoic acids were prepared via the Michael addition of nitromethane to 2-alkenoic esters, followed by catalytic hydrogenation of the resultant 3-(nitromethyl)alkanoic esters using 10% palladium on carbon in acetic acid, and acid hydrolysis of the reduction products.