The bright orange-red color of the toadstool Tricholoma aurantium is due to the benzotropolone pigment aurantricholone (1). The compound is at least partially present as the calcium salt. Minor pigments are the yellow 2H-furo[3,2-b]benzopyran-2-one derivatives aurantricholides A (7a) and B (7b), which exhibit strong green fluorescences. Their structures have been established by total syntheses.
毒蕈菌呈亮橙红色是由于苯并托酚酮色素 aurantricholone (1)。该化合物至少部分以钙盐的形式存在。次要颜料是黄色的 2H-呋喃 [3,2-b]benzopyran-2-one 衍生物 aurantricholides A (7a) 和 B (7b),它们表现出强烈的绿色荧光。它们的结构已通过全合成确定。
Synthesis of (E)- and (Z)-pulvinones
作者:Alexander C. Campbell、Maurice S. Maidment、John H. Pick、Donald F. M. Stevenson
DOI:10.1039/p19850001567
日期:——
one of which involves a novel Wittig reaction. For the first time, members of the E-series, including the parent (E)-pulvinone, are reported and the structural elucidation of the geometric isomers is described. A method for quantitatively converting (E)-pulvinones into (Z)-pulvinones is presented, together with a technique for differentiating between the isomers.