title: S-Substituted cysteine derivatives and thiosulfinate formation in Petiveria alliacea-part II.
abstract: Three cysteine derivatives, (R)-S-(2-hydroxyethyl)cysteine, together with (R(S)R(C))- and (S(S)R(C))-S-(2-hydroxyethyl)cysteine sulfoxides, have been isolated from the roots of Petiveria alliacea. Furthermore, three additional amino acids, S-methyl-, S-ethyl-, and S-propylcysteine derivatives, were detected. They were present only in trace amounts (<3 microg g(-1) fr. wt), precluding determination of their absolute configurations and oxidation states. In addition, four thiosulfinates, S-(2-hydroxyethyl) (2-hydroxyethane)-, S-(2-hydroxyethyl) phenylmethane-, S-benzyl (2-hydroxyethane)- and S-benzyl phenylmethanethiosulfinates, have been found in a homogenate of the roots. The formation pathways of various benzyl/phenyl-containing compounds previously found in the plant were also discussed.
authors.affiliation: Department of Chemistry, State University of New York at Albany, 12222, USA.
authors.forename: Roman
authors.initials: R
authors.lastname: Kubec
authors.forename: Seokwon
authors.initials: S
authors.lastname: Kim
authors.forename: Rabi A
authors.initials: RA
authors.lastname: Musah
mesh_terms: D029748:Caryophyllaceae / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D003545:Cysteine / Q000302:isolation & purification / Q000378:metabolism*; D013057:Spectrum Analysis; D013441:Sulfinic Acids / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D013441:Sulfinic Acids; C100040:thiosulfinic acids; D003545:Cysteine