31262-72-3

Upstream product

• 621-82-9 Cinnamic acid 
• 134-81-6 benzil 
• 39508-55-9 benzaldehyde 
• 34100-63-5 (3R)-[3-3H]-L-tyrosine 
• 57230-45-2 <3-(3)H>-trans-cinnamic acid 

Downstream Products

• 1063716-08-4 C₉H₁₀⁽³⁾HNO₄*ClH 
• 57230-45-2 <3-(3)H>-trans-cinnamic acid 
• 34100-63-5 (3R)-[3-3H]-L-tyrosine 

Relevant academic research and scientific papers

Kinetic and solvent isotope effects on biotransformation of aromatic amino acids and their derivatives

Aromatic amino acids such as l-phenylalanine, l-tryptophan, 3′,4′-dihydroxy-l-phenylalanine (l-DOPA), and their derivatives 3′,4′-dihydroxyphenylacelaldehyde (DOPAL) and 3′,4′-dihydroxyphenylethanol (DOPET), play an essential role in human metabolic processes. Incorrect or slow biotransformation of these compounds leads to some metabolic dysfunctions and in some cases to some neurodegenerative diseases. Therefore, studies of the biotransformation mechanisms of these metabolites draw biochemists' and medical researchers' attention. This study investigates the mechanisms of biotransformation of the aforementioned compounds using kinetic (KIE) and solvent (SIE) isotope effect methods. The overview presents the results and the numerical values of KIE and SIE methods, obtained in the study of biotransformation of l-phenylalanine, 5′-chloro-l-tryptophan, and l-DOPA, catalyzed by the enzymes from the lyases group (phenylalanine ammonia lyase, tryptophan indole-lyase, and tyrosine decarboxylase). Deuterium KIE was also determined during the deamination of 2′-chloro-l-phenylalanine in the presence of the enzyme l-phenylalanine dehydrogenase, as well as in the conversion of DOPAL into DOPET catalyzed by the enzyme alcohol dehydrogenase. The values of KIE and SIE have been determined using a noncompetitive spectrophotometric and a competitive (combined with internal radioactivity standard) radiometric methods.

Enzymatic synthesis of phenylpyruvic acid labeled with deuterium, tritium, and carbon-14

The synthesis of isotopomers of phenylpyruvic acid, PPA, selectively labeled with hydrogen isotopes in the 3-position of the side-chain is reported. Three deuterium or tritium labeled isotopomers of L-phenylalanine, L-Phe, i.e. [(3S)-2H]-L-, [(

Synthesis of tritium labeled isotopomers of L-tyrosine

The synthesis of four selectively labeled isotopomers of L-tyrosine, (L-Tyr), using chemical and enzymatic methods is reported. Four tritium labeled isotopomers of L-phenylalanine (L-Phe) - [2-3H]-, [2′,6′-3H2]-, [3R-3H]- and [3S-3H]- have been synthesized using a combination of chemical and enzymatic methods. The labeled isotopomers of L-Phe have been converted into [2-3H]-, [2′,6′-3H2]-, [3R-3H]-, and [3S-3H]-L-Tyr by using the enzyme L-phenyl-alanine 4′-monooxygenase. Copyright

Synthesis of tritium labeled [3R-3H]-, and [3S-3H]-L-phenylalanine

The synthesis of two selectively labeled isotopomers of L-phenylalanine, (Phe), using chemical and enzymatic methods is reported. The [3R-3H]-L-Phe isotopomer has been obtained from [3-3H]cinnamic acid prepared from benzaldehyde and malonic acid using tritiated water as a source of radioactive label, and by addition of ammonia in the presence of enzyme PAL. The [3S-3H]-L-Phe isotopomer has been synthesized by addition of ammonia to cinnamic acid in a buffered medium containing PAL and tritiated water.