Synthesis of Ureidomuraymycidine Derivatives for Structure– Activity Relationship Studies of Muraymycins
摘要:
One of the key constituents of the muraymycins is the 6-membered cyclic guanidine, (2S,3S)-muraymycidine (or epi-capreomycidine). In order to diversify the structure of the oligopeptide moiety of the muraymycins for thorough structure activity relationship studies, we have developed a highly stereoselective synthesis of ureidomuraymycidine derivatives with the lactone 4a.
Synthesis of Ureidomuraymycidine Derivatives for Structure– Activity Relationship Studies of Muraymycins
摘要:
One of the key constituents of the muraymycins is the 6-membered cyclic guanidine, (2S,3S)-muraymycidine (or epi-capreomycidine). In order to diversify the structure of the oligopeptide moiety of the muraymycins for thorough structure activity relationship studies, we have developed a highly stereoselective synthesis of ureidomuraymycidine derivatives with the lactone 4a.
Inverse Peptide Synthesis via Activated α-Aminoesters
作者:Jean-Simon Suppo、Gilles Subra、Matthieu Bergès、Renata Marcia de Figueiredo、Jean-Marc Campagne
DOI:10.1002/anie.201402147
日期:2014.5.19
procedure for peptide‐bond formation is reported. Instead of activation of the carboxylic acid functionality, the reaction involves an unprecedented use of activated α‐aminoesters. The method provides a straightforward entry to dipeptides and was effective when a sensitive cysteine residue was used, as no epimerization was detected in this case. The applicability of this method to iterative peptide synthesis
N,N′-Carbonyldiimidazole-Mediated DBU-Catalyzed One-Pot Synthesis of Urea-Tethered Glycosyl Amino Acids and Glycoconjugates
作者:V. Sureshbabu
DOI:10.1055/s-0030-1259958
日期:2011.5
An efficient, mild, simple, and alternative one-pot protocol for the synthesis of urea-tethered glycosyl amino acids mediated by N,N′-carbonyldiimidazole employing DBU as a catalyst is described. This protocol is also extended for the synthesis of urea-tethered disaccharides and oligosaccharides.
Sequential One-Pot Synthesis of Dipeptides through the Transient Formation of CDI-<i>N</i>-Protected α-Aminoesters
作者:Renata Marcia de Figueiredo、Jean-Simon Suppo、Camille Midrier、Jean-Marc Campagne
DOI:10.1002/adsc.201700034
日期:2017.6.6
The synthesis of dipeptides through a sequential one‐pot procedure from commercially available protectedaminoacids is described. The transformation relies on the use of in situ generated transiently CDI‐protected α‐amino esters (CDI, e.g. N,N′‐carbonyldiimidazole). In addition of being a highly atom‐economical process, the couplings take place under very mild and neutral conditions without adding
Amino acid derived latent isocyanates: irreversible inactivation of porcine pancreatic elastase and human leukocyte elastase
作者:William C. Groutas、William R. Abrams、Michael C. Theodorakis、Annette M. Kasper、Steven A. Rude、Robert C. Badger、Timothy D. Ocain、Kevin E. Miller、Min K. Moi
DOI:10.1021/jm00380a010
日期:1985.2
were found to inhibitirreversibly both enzymes. Compound 10 was found to be a specific and selective inhibitor of human leukocyte elastase. In contrast to these, inhibitorsderivedfrom glycine methyl ester 1, D-valine methyl ester 4, and D-norvaline methyl ester 6 were found to be inactive. The results of the present study show that latent isocyanates derivedfrom appropriate aminoacids can serve as
5-Substituted-3-(alkoxycarbonyl)alkyl-hydantoin derivatives were prepared by mechanochemistry from amino esters or dipeptides, via a 1,1′-carbonyldiimidazole-mediated one-pot/two-step cyclization reaction involving amino acid unsymmetrical urea A and carboxy-imidazolyl-dipeptide ester B intermediates. Comparative experiments in solution were also performed. The successful preparation of an antibacterial agent precursor