42294-52-0Relevant articles and documents
Facile synthesis of α-hydroxy carboxylic acids from the corresponding α-amino acids
Stuhr-Hansen, Nicolai,Padrah, Shahrokh,Str?mgaard, Kristian
supporting information, p. 4149 - 4151 (2015/02/02)
An effective and improved procedure is developed for the synthesis of α-hydroxy carboxylic acids by treatment of the corresponding protonated α-amino acid with tert-butyl nitrite in 1,4-dioxane-water. The amino moiety must be protonated and located α to a carboxylic acid function in order to undergo initial diazotization and successive hydroxylation, since neither β-amino acids nor acid derivatives such as esters and amides undergo hydroxylations. The method is successfully applied for the synthesis of 18 proteinogenic amino acids.
Efficient S-alkylation of cysteine in the presence of 1,1,3,3- tetramethylguanidine
W?ostowski, Marek,Czarnocka, Sylwia,MacIejewski, Piotr
experimental part, p. 5977 - 5979 (2010/11/21)
The synthesis of S-alkylated cysteine derivatives was carried out successfully in the presence of 1,1,3,3-tetramethylguanidine. Alkylation proceeded in high yields on unprotected amino acids and peptides containing a sulfhydryl group.
Synthesis and biological evaluation of N-mercaptoacylcysteine derivatives as leukotriene A4 hydrolase inhibitors
Enomoto, Hiroshi,Morikawa, Yuko,Miyake, Yurika,Tsuji, Fumio,Mizuchi, Maki,Suhara, Hiroshi,Fujimura, Ken-ichi,Horiuchi, Masato,Ban, Masakazu
scheme or table, p. 442 - 446 (2011/02/26)
We studied synthetic modifications of N-mercaptoacylamino acid derivatives to develop a new class of leukotriene A4 (LTA4) hydrolase inhibitors. S-(4-Dimethylamino)benzyl-l-cysteine derivative 2a (SA6541) showed inhibitory activity against LTA4 hydrolase (IC50, 270 nM) and selectivity over other metallopeptidases except angiotensin-converting enzyme (ACE, IC50, 520 nM). Modification at the para-substituent of the phenyl ring of compound 2a improved LTA4 hydrolase inhibitory activity as well as selectivity over ACE. Finally, we obtained S-(4-cyclohexyl)benzy-l-cysteine derivatives 11l and 16i as potent and selective LTA4 hydrolase inhibitors.
Two new procedures for the introduction of benzyl-type protecting groups for thiols
Richter, Lutz S.,Marsters Jr., James C.,Gadek, Thomas R.
, p. 1631 - 1634 (2007/10/02)
Two new methods for the benzylation of thiols are described: a) direct-S- alkylation with para-substituted benzylic cations; and b) reductive S- alkylations of 2-aminothiols. Both methods provide efficient routes for the introduction of benzyl-type protecting groups in high yields.
