41441-41-2Relevant articles and documents
Telescoped Continuous Flow Synthesis of Optically Active γ-Nitrobutyric Acids as Key Intermediates of Baclofen, Phenibut, and Fluorophenibut
?tv?s, Sándor B.,Kappe, C. Oliver,Llanes, Patricia,Pericàs, Miquel A.
, p. 8122 - 8126 (2020/11/03)
The two-step flow asymmetric synthesis of chiral γ-nitrobutyric acids as key intermediates of the GABA analogues baclofen, phenibut, and fluorophenibut is reported on a multigram scale. The telescoped process comprises an enantioselective Michael-type add
Intermediates for the synthesis of 4-substituted proline derivatives
Crosby, Stuart R.,Sessions, Richard B.,Willis, Christine L.
scheme or table, p. 539 - 542 (2010/10/02)
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. Georg Thieme Verlag Stuttgart · New York.