16874-17-2Relevant articles and documents
Conformational rearrangements by water-soluble peptoid foldamers
Shin, Sung Bin Y.,Kirshenbaum, Kent
, p. 5003 - 5006 (2007)
Peptoids are a family of N-substituted glycine oligomers that are capable of forming stable helical structures. We seek peptoid monomers that can establish a strong folding propensity in aqueous conditions. Here we utilize L-phenylalanine tert-butyl ester
Overcoming the Deallylation Problem: Palladium(II)-Catalyzed Chemo-, Regio-, and Stereoselective Allylic Oxidation of Aryl Allyl Ether, Amine, and Amino Acids
Begam, Hasina Mamataj,Jana, Ranjan,Manna, Kartic,Samanta, Krishanu
supporting information, p. 7443 - 7449 (2020/10/09)
We report herein a Pd(II)/bis-sulfoxide-catalyzed intramolecular allylic C-H acetoxylation of aryl allyl ether, amine, and amino acids with the retention of a labile allyl moiety. Mechanistically, the reaction proceeds through a distinct double-bond isomerization from the allylic to the vinylic position followed by intramolecular carboxypalladation and the β-hydride elimination pathway. For the first time, C-H oxidation of N-allyl-protected amino acids to furnish five-membered heterocycles through 1,3-syn-addition is established with excellent diastereoselectivity.
Probe compounds for fluorescence recognition of amino acid enantiomers and synthesis and applications thereof
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Paragraph 0035, (2019/01/05)
The invention provides probe compounds for fluorescence recognition of amino acid enantiomers. Probe compounds (a, b, c) are prepared by following steps: dissolving dimethyl squarate into anhydrous methanol, dropwise adding methanol solutions of phenylalanine ethyl ester, phenylalanine benzyl ester, and phenylalanine tert-butyl ester, after addition, stirring the solution for 20 to 24 hours at a room temperature, filtering the solution, and finally washing the filter residues by ethyl acetate several times. When D-proline is added into ethanol-water solutions of chiral probe compounds (a, c),the fluorescence strength of the solutions is reduced; when L-proline is added into the solutions, the fluorescence strength of the solutions is enhanced obviously; and thus the probe compounds (a,c)have a good recognition effect on two enantiomers of proline. When L-valine is added into ethanol-water solutions of the probe compound (b), the fluorescence strength of the solution is obviously reduced; when D-valine is added into the solution, the fluorescence strength of the solution is not changed; and thus the probe compound (b) has a good recognition effect on two enantiomers of valine.