scholarly journals SYNTHESES OF SUBSTITUTED GUANIDINES

1958 ◽  
Vol 36 (10) ◽  
pp. 1436-1440 ◽  
Author(s):  
Paul E. Gagnon ◽  
Jean L. Boivin ◽  
Joseph Zauhar
Keyword(s):  
Amino Acids ◽  
Aqueous Medium ◽  
Sulphuric Acid ◽  
Metal Salts ◽  
Calcium Cyanamide ◽  
Guanidine Carbonate ◽  
Acid Esters

Ethyl-, propyl-, and benzyl-guanidine nitrates were prepared from amine nitrates and calcium cyanamide or dicyandiamide. Carboxyalkylguanidines were made by condensing the corresponding amino acids with guanidine carbonate in aqueous medium. All the guanidine nitrates, except the benzyl derivative, were converted into the corresponding nitroguanidines by treatment with concentrated sulphuric acid. Esters and metal salts of 1-(α-carboxyalkyl)-2-nitroguanidines were also prepared.

Nonenzymatic Catalysis by Metal Ions and Phosphoric Acid Esters of Hydroxamic Acid Formation

1980 ◽  
Vol 35 (6) ◽  
pp. 727-730
Author(s):  
Oemer Saygin ◽  
Peter Decker
Keyword(s):  
Amino Acids ◽  
Phosphoric Acid ◽  
Metal Ions ◽  
Inorganic Phosphate ◽  
Hydroxamic Acid ◽  
Hydroxamic Acids ◽  
Bivalent Ions ◽  
No Release ◽  
Catalytic Effects ◽  
Acid Esters

Abstract Nonenzymatic catalysis by bivalent ions of Be, Mg, Ca, Zn, Mn, Ni and Co and bioorganic phosphates of the formation of hydroxamic acids from acetate or amino acids has been studied systematically. Increased yields of hydroxamate were observed at particular combinations of reactants. The most prominent increase (ca. 15-fold) was found with acetate and Ni++, and with a combination of ATP and Be++. Among others especially ribose-5-phosphate and glucose-5-phosphate enhanced yields in the presence of most metal ions. Since no release of inorganic phosphate was observed, this effect cannot be interpreted as an evidence for intermediate transhosphorylation reactions; it may also result from simple catalytic effects of metal sugar complexes.

ChemInform Abstract: A SYNTHESIS OF N-PHTHALOYL AMINO ACIDS AND AMINO ACID ESTERS UNDER MILD CONDITIONS

1973 ◽  
Vol 4 (40) ◽  
pp. no-no
Author(s):  
D. A. HOOGWATER ◽  
D. N. REINHOUDT ◽  
T. S. LIE ◽  
J. J. GUNNEWEG ◽  
H. C. BEYERMAN
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Amino Acid Esters ◽  
Mild Conditions ◽  
Acid Esters

Reactivity of α-amino acids in the N-acylation with benzoic acid esters in aqueous dioxane

2010 ◽  
Vol 80 (5) ◽  
pp. 964-967 ◽  
Author(s):  
N. R. Ishkulova ◽  
L. E. Oparina ◽  
L. B. Kochetova ◽  
T. P. Kustova ◽  
N. V. Kalinina ◽  
...  
Keyword(s):  
Amino Acids ◽  
Benzoic Acid ◽  
Aqueous Dioxane ◽  
Acid Esters

Chiroptical sensing of unprotected amino acids, hydroxy acids, amino alcohols, amines and carboxylic acids with metal salts

2019 ◽  
Vol 55 (44) ◽  
pp. 6297-6300 ◽  
Author(s):  
Ciarán C. Lynch ◽  
Zeus A. De los Santos ◽  
Christian Wolf
Keyword(s):  
Amino Acids ◽  
Carboxylic Acids ◽  
Amino Alcohols ◽  
Metal Salts ◽  
Hydroxy Acids ◽  
Optical Chirality ◽  
Iron Palladium

Optical chirality sensing of unprotected amino acids, hydroxy acids, amino alcohols, amines and carboxylic acids based on a practical mix-and-measure protocol with readily available copper, iron, palladium, manganese, cerium or rhodium salts is demonstrated.

Nickel-catalyzed carbodifunctionalization of N-vinylamides enables access to γ-amino acids

2020 ◽  
Vol 56 (17) ◽  
pp. 2642-2645 ◽  
Author(s):  
Zhi-Fang Yang ◽  
Chang Xu ◽  
Xing Zheng ◽  
Xingang Zhang
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Tandem Reaction ◽  
Amino Acid Esters ◽  
Arylboronic Acids ◽  
Acid Esters

A nickel-catalyzed tandem reaction of N-vinylamides with arylboronic acids and bromodifluoroacetate has been developed. The reaction efficiently furnishes a series of protected α,α-difluoro-γ-amino acid esters.

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