verrucine B 在
air 作用下,
以
甲醇 、 氘代二甲亚砜 为溶剂,
生成 (1S,4S)-1,3,4,6-tetrahydro-3,6-dioxo-1-hydroxy-1-(phenylmethyl)-2H-pyrazino[2,1-b]quinazoline-4-propanamide
参考文献:
名称:
Total Solid Phase Syntheses of the Quinazoline Alkaloids: Verrucines A and B and Anacine
摘要:
The first total syntheses of verrucines A and B and anacine (revised structure) were accomplished on Sasrin resin. This work confirmed the structure of verrucine A and unambiguously showed verrucine B to be a derivative of D-phenylalanine and L-glutamine, The study also proved that anacine and its epimer are quinazoline alkaloids, not benzodiazepines as originally proposed. 1-Hydroxyverrucine B, derived from air oxidization of verrucine B, was also isolated and characterized.
Total Solid Phase Syntheses of the Quinazoline Alkaloids: Verrucines A and B and Anacine
摘要:
The first total syntheses of verrucines A and B and anacine (revised structure) were accomplished on Sasrin resin. This work confirmed the structure of verrucine A and unambiguously showed verrucine B to be a derivative of D-phenylalanine and L-glutamine, The study also proved that anacine and its epimer are quinazoline alkaloids, not benzodiazepines as originally proposed. 1-Hydroxyverrucine B, derived from air oxidization of verrucine B, was also isolated and characterized.
Verrucine F, a Quinazoline from <i>Penicillium verrucosum</i>
作者:Su-lin Leong、Johan Schnürer、Anders Broberg
DOI:10.1021/np800105e
日期:2008.8.1
Verrucine F (3), a quinazoline similar to verrucines A (1) and B (2), contains one anthranilic acid residue, one L-glutamine residue, and one alpha,beta-unsaturated phenylalanine residue, as determined by NMR, MS, and chemical methods. Compounds I and 3, but not 2, were produced by Penicillium verrucosum J255 and eight additional P. verrucosum strains. Verrucines were typically more concentrated in the inner (older) parts of the colony, and 3 peaked 4-8 days after 1, but at 10-fold lower concentrations (similar to 200 mu g/g). Verrucine F (3) formed spontaneously from 1 in buffered water solutions. probably by oxidation at C-1 followed by water elimination.