Reactivity and Selectivity of Iminium Organocatalysis Improved by a Protein Host
作者:Alexander R. Nödling、Katarzyna Świderek、Raquel Castillo、Jonathan W. Hall、Antonio Angelastro、Louis C. Morrill、Yi Jin、Yu-Hsuan Tsai、Vicent Moliner、Louis Y. P. Luk
DOI:10.1002/anie.201806850
日期:2018.9.17
There has been growing interest in performing organocatalysis within a supramolecular system as a means of controlling reaction reactivity and stereoselectivity. Here, a protein is used as a host for iminium catalysis. A pyrrolidine moiety is covalently linked to biotin and introduced to the proteinhost streptavidin for organocatalytic activity. Whereas in traditional systems stereoselectivity is
Simple preparation of new [<sup>18</sup>F]F-labeled synthetic amino acid derivatives with two click reactions in one-pot and SPE purification
作者:Cheol-Min Yook、Sang Ju Lee、Seung Jun Oh、Hyun-Joon Ha、Jong Jin Lee
DOI:10.1002/jlcr.3297
日期:2015.6.30
New [(18) F]fluorinated 1,2,3-triazolyl aminoacidderivatives were efficiently prepared from Huisgen 1,3-dipolar cycloaddition reactions, well known as clickreaction. We developed two simultaneous clickreactions in one-pot with a simple solid-phase extraction (SPE) purification method. [(18) F]fluoro-1-propyne was obtained at a 45% non-decay corrected radiochemical yield based on the [(18) F]fluoride
[EN] CAGED AMINO ACIDS FOR CONTROLLED METABOLIC INCORPORATION AND METHODS OF USE<br/>[FR] ACIDES AMINÉS BLOQUÉS EN VUE D'UNE INCORPORATION MÉTABOLIQUE CONTRÔLÉE ET PROCÉDÉS D'UTILISATION
申请人:UNIV WASHINGTON
公开号:WO2019152801A1
公开(公告)日:2019-08-08
The present disclosure features non-canonical or heavy isotope-containing amino acids, where the alpha-amino terminus and/or carboxvlic acid terminus is modified with molecular cages. The molecular cage-modified amino acids are precluded from metabolic incorporation into proteins within living bacterial, plant, or mammalian cells, or from cell- free protein expression. Once uncaged, the amino acids are readily recognized by native and/or engineered tRNA synthetases, and can subsequently be incorporated into newly- synthesized proteins during protein translation.
Chemo-selective Rh-catalysed hydrogenation of azides into amines
作者:Mattia Ghirardello、Helene Ledru、Abhijit Sau、M. Carmen Galan
DOI:10.1016/j.carres.2020.107948
日期:2020.3
Rh/Al2O3 can be used as an effective chemo-selective reductive catalyst that combines the mild conditions of catalytic hydrogenation with high selectivity for azide moieties in the presence of other hydrogenolysis labile groups such as benzyl and benzyloxycarbonyl functionalities. The practicality of this strategy is exemplified with a range of azide-containing carbohydrate and amino acid derivatives