Phytotoxins from <i>Hofmeisteria schaffneri</i>: Isolation and Synthesis of 2‘-(2‘ ‘-Hydroxy-4‘ ‘-methylphenyl)-2‘-oxoethyl Acetate
作者:Araceli Pérez-Vásquez、Adelfo Reyes、Edelmira Linares、Robert Bye、Rachel Mata
DOI:10.1021/np0501278
日期:2005.6.1
euparin, and 3',4',4a',9a'-tetrahydro-6,7'-dimethylspiro[benzofuran-3(2H),2'-pyrano[2,3-b]benz ofuran]-2,4a'-diol (2) were obtained. The identification of the isolates was accomplished by spectroscopic methods. The structure of 1 was unequivocally confirmed by synthesis. The methyl derivative 1a was also synthesized following the same strategy. Compounds 1 and 2 inhibited radicle growth of Amaranthus hypochondriacus
Schaffneri的CH(2)Cl(2)-MeOH(1:1)提取物的活性定向分馏导致分离出特征为2'-(2'-羟基-4''-甲基苯基的新植物毒素)-2'-氧代乙酸乙酯,并命名为hofmeisterin(1)。另外,已知化合物β-胡萝卜素,肝素和3',4',4a',9a'-四氢-6,7'-二甲基螺[苯并呋喃-3(2H),2'-吡喃[2,3-得到[b]呋喃苯并] -2,4a'-二醇(2)。分离物的鉴定通过光谱法完成。合成明确地证实了1的结构。遵循相同的策略也合成了甲基衍生物1a。化合物1和2抑制hypo菜的软骨生长(IC(50)= 3.2 x 10(-4)和1.2 x 10(-5)M,