Vorstufen cyclischer Polysulfide in den Samen von Parkia speciosa Hassk. / Precursors of Cyclic Polysulphides in Seeds of Parkia speciosa Hassk.

1982 ◽  
Vol 37 (7-8) ◽  
pp. 584-586 ◽  
Author(s):  
Rudy Susilo ◽  
Rolf Gmelin
Keyword(s):  
Amino Acids ◽  
Carboxylic Acid ◽  
Imino Acid ◽  
Djenkolic Acid

Abstract Two sulphur containing amino acids, dichrostachinic acid and djenkolic acid, and one sulphur containing imino acid, thiazolidine-4-carboxylic acid, have been isolated from the seeds o f Parkia speciosa Hassk. Dichrostachinic acid and djenkolic cyclic polysulphides in Parkia speciosa Hassk.

Synthesis and Antibacterial Potency of 4-Methyl-2,7-dioxo-1,2,3,4,7,10- hexahydropyrido[2,3-ƒ]quinoxaline-8-carboxylic acid, Selected [a]-Fused Heterocyles and Acyclic Precursors

2007 ◽  
Vol 62 (11) ◽  
pp. 1453-1458 ◽  
Author(s):  
Yusuf M. Al-Hiari ◽  
Ali M. Qaisia ◽  
Mohammad Y.Abu Shuheil ◽  
Mustafa M. El-Abadelah ◽  
Wolfgang Voelter
Keyword(s):  
Amino Acids ◽  
Carboxylic Acid ◽  
Antibacterial Activities ◽  
Sodium Dithionite ◽  
E Coli ◽  
Pipecolinic Acid

The reaction of 7-chloro-1-cyclopropyl-6-fluoro-8-nitro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (7) with each of sarcosine and (±)-pipecolinic acid afforded the corresponding N-(4- oxoquinolin-7-yl)-α-amino acids 8 and 9. Reductive lactamization of the latter with sodium dithionite gave hexahydropyrido[2,3- f ]quinoxaline (10) and octahydrodipyrido[1,2-a : 2,3- f ]quinoxaline (11) derivatives, respectively. Compounds 8 - 11 and their homologs 1 - 6, accessible from (S)-proline, (2S, 4R)-4-hydroxyproline and (S)-tetrahydroisoquinoline-3-carboxylic acid exhibit good to excellent antibacterial activities against E. coli and S. aureus.

Enzymatic resolution of (±)-5-phenyl-4,5-dihydroisoxazole-3-carboxylic acid ethyl ester and its transformations into polyfunctionalised amino acids and dipeptides

2009 ◽  
Vol 20 (16) ◽  
pp. 1940-1947 ◽  
Author(s):  
Giuseppe Cremonesi ◽  
Piero Dalla Croce ◽  
Alessandra Forni ◽  
Maddalena Gallanti ◽  
Raffaella Gandolfi ◽  
...  
Keyword(s):  
Amino Acids ◽  
Carboxylic Acid ◽  
Ethyl Ester ◽  
Acid Ethyl Ester ◽  
Enzymatic Resolution

scholarly journals A new imino acid, L-1,4-thiazane-3-carboxylic acid from Heterochordaria abietina.

1977 ◽  
Vol 43 (11) ◽  
pp. 1293-1297 ◽  
Author(s):  
Hiroshi KAWAUCHI ◽  
Takashi KOZURU ◽  
Shizuyuki OTA ◽  
Tateo SUZUKI
Keyword(s):  
Carboxylic Acid ◽  
Imino Acid

scholarly journals Proline Control of the Feeding Reaction of Cordylophora

1963 ◽  
Vol 46 (4) ◽  
pp. 823-837 ◽  
Author(s):  
Chandler Fulton
Keyword(s):  
Carboxylic Acid ◽  
Brine Shrimp ◽  
Reduced Glutathione ◽  
Significant Activity ◽  
Magnesium Ions ◽  
Active Molecule ◽  
Imino Acid ◽  
Phylogenetic Implications ◽  
Imino Acids ◽  
Colonial Hydroid

The colonial hydroid Cordylophora is a carnivore whose feeding is induced by substances released from captured prey. An active molecule, probably the only one, has been isolated from a fraction of the laboratory food of Cordylophora, brine shrimp larvae, and identified on paper chromatograms as the imino acid proline. Reagent proline induces the feeding reaction at 10-5 M. The reaction is specific in that only two α-imino acids very closely related to proline were found to possess significant activity: azetidine-2-carboxylic acid and pipecolic acid. The response to proline is inhibited by magnesium ions and enhanced by phosphate. Since previous studies have shown that the feeding reactions of Hydra, Physalia, and Campanularia are controlled by reduced glutathione, the phylogenetic implications of the proline control of feeding in Cordylophora are discussed. The feeding reactions of both Cordylophora and Hydra are also induced by proteases, suggesting similar mechanisms of induction in the two hydroids.

scholarly journals Amino acids and derivatives of thiazole-4-carboxylic acid as constituents of thiopeptin B.

1977 ◽  
Vol 30 (5) ◽  
pp. 383-387 ◽  
Author(s):  
ICHIRO MURAMATSU ◽  
YOSHIAKI MOTOKI ◽  
MASAAKI AOYAMA ◽  
HIDEO SUZUKI
Keyword(s):  
Amino Acids ◽  
Carboxylic Acid ◽  
Amino Acids And Derivatives ◽  
Derivatives Of

Pyrazole amino acids: hydrogen bonding directed conformations of 3-amino-1H-pyrazole-5-carboxylic acid residue

2017 ◽  
Vol 23 (9) ◽  
pp. 716-726 ◽  
Author(s):  
Anna Kusakiewicz-Dawid ◽  
Monika Porada ◽  
Wioletta Ochędzan-Siodłak ◽  
Małgorzata A. Broda ◽  
Maciej Bujak ◽  
...  
Keyword(s):  
Amino Acids ◽  
Hydrogen Bonding ◽  
Carboxylic Acid

Bis- and Trisamides Derived From 1′-Aminoferrocene-1-carboxylic Acid and α-Amino Acids: Synthesis and Conformational Analysis

2009 ◽  
Vol 28 (7) ◽  
pp. 2028-2037 ◽  
Author(s):  
Mojca Čakić Semenčić ◽  
Daniel Siebler ◽  
Katja Heinze ◽  
Vladimir Rapić
Keyword(s):  
Amino Acids ◽  
Carboxylic Acid ◽  
Conformational Analysis

A Study of 2,4,6-Trinitrobenzenesulfonic Acid for Automated Amino Acid Chromatography

1968 ◽  
Vol 14 (10) ◽  
pp. 967-978 ◽  
Author(s):  
Harold H Brown
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Room Temperature ◽  
Lower Sensitivity ◽  
Static System ◽  
Optimum Conditions ◽  
Trinitrobenzenesulfonic Acid ◽  
Imino Acid ◽  
Major Disadvantage ◽  
Heating Bath

Abstract The reaction of 2,4,6-trinitrobenzenesulfonic acid (TNBS) with amino acids was investigated by a static system to develop optimum conditions for application to automated amino acid chromatography. TNBS was found to be a very simple and sensitive reagent, easier to use than ninhydrin. The reaction occurs quite rapidly at room temperature, eliminating the requirement of a heating bath. The major disadvantage is a much lower sensitivity to the imino acid proline than to the amino acids.

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