Biomimetic Stereoselective Formation of Methyllanthionine
作者:Hao Zhou、Wilfred A. van der Donk
DOI:10.1021/ol025629g
日期:2002.4.1
(Dhb)-containing peptides. Biomimeticcyclization via Michael addition of Cys to a Dhb yielded the B-ring of the lantibiotic subtilin as a single diastereomer. The methyllanthionine product was shown to have the natural configuration by preparation of the authentic stereoisomer. The formation of a single isomer suggests that the prepeptide has a strong intrinsic preference for the stereochemistry observed in lantibiotics
Scalable Synthesis of Orthogonally Protected β-Methyllanthionines by Indium(III)-Mediated Ring Opening of Aziridines
作者:Ziran Li、Zachary Gentry、Brennan Murphy、Michael S. VanNieuwenhze
DOI:10.1021/acs.orglett.9b00125
日期:2019.4.5
acids, which are characteristic features of lantibiotics. In this paper, we report the facile stereoselective synthesis of β-methyllanthionines with orthogonal protection by nucleophilic ringopening of aziridines. This method leads to an expedient access to β-methyllanthionines and allows production of over 30 g of β-methyllanthionine in a single batch.
Asymmetric ketone reduction using chiral oxazaborolidines derived from aziridine carbinols
作者:Johannes G.H. Willems、F. Jan Dommerholt、Jeannet B. Hammink、Ariëla M. Vaarhorst、Lambertus Thijs、Binne Zwanenburg
DOI:10.1016/0040-4039(94)02313-z
日期:1995.1
Asymmetric borane reduction of acetophenone using 1,3,2-oxazaborolidines derivedfrom aziridine-2-tertiairy alcohols 1 and 2 yielded the corresponding alcohol in high optical yields. The synthesis of the novel chiral catalysts 1 and 2 using D-and L-serine, and D-and L-threonine as starting material is described.
Versatile and Stereoselective Syntheses of Orthogonally Protected β-Methylcysteine and β-Methyllanthionine
作者:Radha S. Narayan、Michael S. VanNieuwenhze
DOI:10.1021/ol0507930
日期:2005.6.1
activity against Gram-positive bacteria. As part of our research effort directed toward the synthesis and mechanistic study of the lantibiotic peptide mersacidin (1), we report stereoselectivesyntheses of orthogonally protected beta-methylcysteine (beta-MeCys) and beta-methyllanthionine (beta-MeLan), two key nonnatural amino acid components of the mersacidin architecture.
threo-3-Methyl-d-cysteine as a moiety of β-methyllanthionine in the peptide antibiotic nisin was synthesized stereospecifically. The reaction of (2R,3R)-3-methyl-2-aziridinecarboxylic acid derivative prepared from d-threonine with thiobenzoic acid gave the β-mercapto α-amino acid derivative of the same configuration as the starting material. A stereochemistry of the product was retained as a result of double inversion mechanism through the reactions. Thus, we could prepare threo-3-methyl-d-cysteine, i.e., (2S,3S)-2-amino-3-mercaptobutanoic acid which is required for the synthetic study of nisin.