80612-97-1Relevant articles and documents
Synthesis and preliminary biological evaluation of new phenolic and catecholic dehydroamino acid derivatives
Monteiro, Luís S.,Oliveira, Sandra,Paiva-Martins, Fátima,Ferreira, Paula M.T.,Pereira, David M.,Andrade, Paula B.,Valent?o, Patrícia
, p. 6199 - 6209 (2017)
A library of N-phenolic and N-catecholic dehydroamino acid derivatives was prepared using an innovative synthetic strategy that involves mild reaction conditions and simple work-up procedures. The method comprises coupling of phenolic or catecholic acids with β-hydroxyamino acids followed by tert-butyloxycarbonylation of all hydroxyl groups using tert-butyldicarbonate and 4-dimethylaminopyridine as catalyst. Treatment of these amino acids with N,N,N′,N′-tetramethylguanidine affords the corresponding O-tert-butyloxycarbonyldehydroamino acid derivative. Deprotection of the aromatic hydroxyl groups is carried out with trifluoroacetic acid. This synthetic strategy can be applied in a one-pot procedure and yields compounds that can be easily inserted into peptides or other biomolecules after cleavage of the C-protecting group. Preliminary studies of cell viability show that these new compounds display very low or no toxicity. These dehydroamino acids with a phenolic or catecholic moiety can have intrinsic biological activity or used to prepare new hydrogels that mimic mussel adhesive proteins.
Cu/Mn Co-oxidized cyclization for the synthesis of highly substituted pyrrole derivatives from amino acid esters: A strategy for the biomimetic syntheses of lycogarubin c and chromopyrrolic acid
Zhou, Nini,Xie, Tao,Liu, Lin,Xie, Zhixiang
, p. 6061 - 6068 (2014/07/21)
An effective and concise approach to synthesis of tetrasubstituted pyrroles from readily available amino acid esters by the promotion of Cu(OAc) 2 in conjunction with Mn(OAc)3 has been developed. This reaction proceeds through multiple dehydrogenations, deamination, and oxidative cyclization. This oxidized system tolerates substrates bearing various electron-donating or electron-withdrawing groups. With this methodology, several key intermediates of natural products have been effectively prepared, and the total syntheses of lycogarubin C and chromopyrrolic acid have been completed in high efficiency.
Dehydrooligopeptides. V. Synthesis of N-carboxy α-dehydroamino acid anhydrides and their transformation of α-dehydroamino acid and dehydrooligopeptide derivatives
Shin,Yonezawa,Yamada
, p. 3934 - 3944 (2007/10/02)
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