23360-92-1Relevant articles and documents
Synthesis of anti-tumor dimeric indole alkaloids in catharanthus roseus was promoted by irradiation with near-ultraviolet light at low temperature
Asano, Mamiko,Harada, Kazuo,Yoshikawa, Tomoaki,Bamba, Takeshi,Hirata, Kazumasa
body text, p. 386 - 389 (2010/10/03)
We have found that coupling between catharanthine and vindoline occurs non-enzymatically in the presence of flavin mononucleotide and manganese ions with near- ultraviolet light irradiation in vitro. The present study found that the concentrations of cath
ALKALOID PRODUCTION IN CATHARANTHUS ROSEUS (L.) G. DON CELL CULTURES. XVI. BIOTRANSFORMATION OF 3',4'-ANHYDROVINBLASTINE WITH CATHARANTHUS ROSEUS CELL CULTURES AND ENZYME SYSTEMS
Kutney, James Peter,Botta, Bruno,Boulet, Camille Andre,Buschi, Carlos Alberto,Choi, Lewis Siu Leung,et al.
, p. 629 - 638 (2007/10/02)
Employing cell cultures of Catharanthus roseus and enzyme systems derived from such cultures, a detailed study of the biotransformation of 3',4'-anhydrovinblastine (3) is described.It is shown that enzymatic conversion of 3 to the isolated end products, the bisindole alkaloids leurosine (4), vinblastine (5), catharine (6), vinamidine (7) and hydroxyvinamidine (8) proceeds initially to the same dihydropyridinium intermediate (9) obtained when the monomeric alkaloids catharanthine (1) and vindoline (2) are enzymatically coupled.These data establish that the overall biosynthetic pathway to the bisindole alkaloids proceeds from 1 and 2 to the initially formed 9 and the latter, under enzymatically controlled oxidation-reduction, affords the alkaloids 3-8.However, when 3 is incubated as substrate, the enzymes are capable of utilizing and converting it into the alkaloids 4-8.In summary, 3 is not a direct biosynthetic precursor of 4-8.
ALKALOID PRODUCTION IN CATHARANTHUS ROSEUS (L.) G. DON CELL CULTURES. XIV. THE ROLE OF UNSTABLE DIHYDROPYRIDINIUM INTERMEDIATES IN THE BIOSYNTHESIS OF BISINDOLE ALKALOIDS
Kutney, James Peter,Boulet, Camille Andre,Choi, Lewis Siu Leung,Gustowski, Wlodzimierz,McHugh, Michael,et al.
, p. 613 - 620 (2007/10/02)
Employing enzyme systems obtained from Catharanthus roseus cell cultures, experiments relating to the biosynthesis of various bisindole alkaloids are described.Specifically, the enzyme-catalyzed coupling of catharanthine (1) and vindoline (2) to a highly unstable dihydropyridinium intermediate (9), important in the biosynthesis of 3',4'-anhydrovinblastine (3), leurosine (4), catharine (6), vinamidine (7) and hydroxyvinamidine (8) is presented.Conversions of 9 to these alkaloids and its role in the biosynthesis is discussed.Although catharanthine is well utilized by the enzyme system, catharanthine N-oxide (10), an important intermediate in the chemical coupling of 1 and 2 to afford 9, is not utilized.
ALKALOID PRODUCTION IN CATHARANTHUS ROSEUS (L.) G. DON CELL CULTURES, XV. SYNTHESIS OF BISINDOLE ALKALOIDS BY USE OF IMMOBILIZED ENZYME SYSTEMS
Kutney, James Peter,Boulet, Camille Andre,Choi, Lewis Siu Leung,Gustowski, Wlodzimierz,McHugh, Michael,et al.
, p. 621 - 628 (2007/10/02)
Affinity gel bound enzyme systems obtained from Catharanthus roseus cell cultures were employed to establish a high yielding enzymatic system for the coupling of catharanthine (1) and vindoline (2) to 3',4'-anhydrovinblastine (3) and leurosine (4).Long term enzymatic activity can be preserved by this technique, an aspect which may prove important in subsequent utilization of such systems in large scale production.