Unnatural α-amino ethyl esters from diethyl malonate or ethyl β-bromo-α-hydroxyiminocarboxylate
作者:Eloi P Coutant、Vincent Hervin、Glwadys Gagnot、Candice Ford、Racha Baatallah、Yves L Janin
DOI:10.3762/bjoc.14.264
日期:——
We have explored here the scope of the age-old diethyl malonate-based accesses to α-aminoesters involving Knoevenagel condensations of diethyl malonate on aldehydes, reductions of the resulting alkylidenemalonates, the preparation of the corresponding α-hydroxyimino esters and their final reduction. This synthetic pathway turned out to be general although some unexpected limitations were encountered
Iron-Catalyzed Oxidative CH/CH Cross-Coupling: An Efficient Route to α-Quaternary α-Amino Acid Derivatives
作者:Kaizhi Li、Guangying Tan、Jingsheng Huang、Feijie Song、Jingsong You
DOI:10.1002/anie.201306181
日期:2013.12.2
Fully loaded: A coordinating activation strategy has been developed to furnish α‐quaternary α‐amino acids through the iron(III)‐catalyzed oxidative functionalization of α‐C(sp3)H bonds of α‐tertiary α‐amino acid esters. The reaction exhibits a broad substrate scope for both α‐amino acids and nucleophiles (Nu) as well as good functional‐group tolerance (see scheme, DTBP=di‐tert‐butyl peroxide, DCE=1
[EN] IMIDAZOPYRAZINE DERIVATIVES, PROCESS FOR PREPARATION THEREOF, AND THEIR USES AS LUCIFERINS<br/>[FR] DÉRIVÉS D'IMIDAZOPYRAZINE, LEUR PROCÉDÉ DE PRÉPARATION ET LEURS UTILISATIONS EN TANT QUE LUCIFÉRINES
申请人:PASTEUR INSTITUT
公开号:WO2018197727A1
公开(公告)日:2018-11-01
The present invention is in the field of bioluminescence in biology and/or medicine. In particular, the invention provides imidazopyrazine derivatives, processes for preparation thereof, and their uses as luciferins.
A chiralaldehyde is rationally combined with a Lewis acid and a transition metal for the first time to form a triple catalytic system. This cocatalytic system exhibits good catalytic activation and stereoselective-control abilities in the asymmetric α-allylation reaction of N-unprotected amino acid esters and allyl acetates. Optically active α,α-disubstituted α-amino acids (α-AAs) are generated in
IMIDAZOPYRAZINE DERIVATIVES, PROCESS FOR PREPARATION THEREOF, AND THEIR USES AS LUCIFERINS
申请人:Institut Pasteur
公开号:EP3395803A1
公开(公告)日:2018-10-31
The present invention is in the field of bioluminescence in biology and/or medicine. In particular, the invention provides imidazopyrazine derivatives, processes for preparation thereof, and their uses as luciferins.