Biosynthesis of Sulfur Compounds. Investigations of the Biosinthesis of Asparagusic Acid.
Investigations of the biosynthesis of the naturally occuring 1,2-dithiolane asparagusic acid (1) in Asparagus officinalis have shovn that the substance is derived from inobutyric acid via the intermediacy of methacrylic acid, 2-methyl-3-mercaptopropionic acid, and S-(2-carboxy-n-propyl) cysteine.The conversion of isobutyric acid to methacrylic acid in Asparagus has also been shown to proceed by oxidation of the 2-pro-S methyl group of isobutyrate.Finally, the absolute configuration of naturally occuring S-(2-carboxy-n-propyl)cysteine has been determined.
Parry, Ronald J.,Mizusawa, A.E.,Chiu, I.C.,Naidu, M.V.,Ricciardone, M.
p. 2512 - 2521
(2007/10/02)
DETERMINATION OF THE ABSOLUTE CONFIGURATION OF (-)-S-(2-CARBOXYPROPYL)-L-CYSTEINE
The absolute configuration of the naturally occuring amino acid (-)-S-(2-carboxypropyl)-L-cystein has been determined by asymmetric synthesis.
Parry, Ronald J.,Naidu, Motupalli V.
p. 1133 - 1134
(2007/10/02)
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