A synthetic route toward α,α-dialkyl α-amino ester derivatives via radical addition to hydrazone derivatives of α-ketoesters under “on-water” conditions
作者:Tae Kyu Nam、Doo Ok Jang
DOI:10.1016/j.tetlet.2019.151411
日期:2020.1
bond in hydrazone derivatives of α-ketoesters under “on-water” conditions has been described. The present method provides a route to synthesize α,α-dialkyl α-aminoesters, which are difficult to obtain using other methods because of their intrinsically low activity. The radical addition reaction is more efficient when performed under “on-water” conditions than when performed in an organic solvent, showing
Bifunctional peptide-thiourea organocatalysts enantioselectively catalyzeMannichreaction between tosyl-protected glyoxylate imine and pyruvate esters. N-terminal proline moiety is responsible for the stereoinduction of this reaction. DFT calculations, NMR spectroscopy, and mass spectrometry confirm bifunctional nature of the catalyst and simultaneous activation of both substrates.
Activation of carbonyl beta-carbons for chemical transformations
申请人:Nanyang Technological University
公开号:US11306097B2
公开(公告)日:2022-04-19
The present invention relates to a method for synthesizing a compound of Formula (I)
as defined herein, comprising: (i) activating a compound of Formula (II)
as defined herein, by reacting said compound of Formula (II) with a compound of Formula (III)
as defined herein, in the presence of a base, to obtain a compound of Formula (IV)
as defined herein; and (ii) reacting the compound of Formula (IV) with an electrophile to obtain the compound of Formula (I). The present invention further relates to the organocatalysts used in the described methods and their respective uses.