Oxyfunctionalization of abundant carboxylic acids represents a direct approach to synthesizing α-hydroxyacids, which are valuable intermediates of various active pharmaceutical ingredients. Although ideal, the transformation is yet to be accomplished. Herein, enantiocomplementary C(sp3)–H oxyfunctionalization for the synthesis of α-hydroxyacids was realized by a cooperative strategy of substrate
Ir(tri-N-heterocyclic carbene)-catalyzed upgrading of glycerol: C–C bond formation for the synthesis of α-hydroxy acids
作者:Heemin Byeon、Jaeho Kim、Mi-hyun Lee、Hye-Young Jang
DOI:10.1039/d3ob02035e
日期:2024.2.21
Ir(triNHC) complexes catalyzed glycerol and alcohol dehydrogenative coupling, yielding diverse α-hydroxyacids. Unlike conventional conditions, Ir(triNHC) facilitated additional C–C bond formation after lactic acid production from glycerol, exhibiting high TOFs. This protocol successfully converted 1,2-propanediol and sorbitol into α-hydroxyacids, highlighting biomass-derived sources’ potential as
Synthesis of α-Hydroxy Carboxylic Acids via a Nickel(II)- Catalyzed Hydrogen Transfer Process
作者:Guo Tang、Chien-Hong Cheng
DOI:10.1002/adsc.201100241
日期:2011.8
catalytic system for β-alkylation of lactic acid with primary alcohols has been developed. In the presence of nickel(II) acetate tetrahydrate [Ni(OAc)2(H2O)4] and base, lactic acid reacts with primary alcohols to afford the corresponding coupled α-hydroxycarboxylicacids in good to excellent yields via a hydrogentransferprocess without any hydrogen acceptor or hydrogen donor.