Isolation, synthesis and photochemical properties of almazolone, a new indole alkaloid from a red alga of Senegal
作者:Graziano Guella、Ibrahima N'Diaye、Mouhamadou Fofana、Ines Mancini
DOI:10.1016/j.tet.2005.10.072
日期:2006.2
An indole alkaloid bearing an oxazolone ring, christened almazolone, has been isolated from a new collection of Haraldiophyllum sp. from Dakar (Senegal), as an 88:12 mixture of (Z)/(E) stereoisomers. The relative ratio could be modified under controlled photochemical and thermal processes. The product (Z)-3-indolyl-2-(phenyl-propionylamino)-acrylic acid obtained by oxazolone ring opening has also been
从新的Haraldiophyllum sp。中分离出一种带有恶唑酮环的吲哚生物碱,命名为almazolone。购自达喀尔(塞内加尔),为(Z)/(E)立体异构体的88:12混合物。相对比例可以在受控的光化学和热过程中进行修改。还已经观察到通过恶唑酮开环获得的产物(Z)-3-吲哚基-2-(苯基-丙酰氨基)-丙烯酸。已通过合成获得的(Z)-咪唑酮的碱性水解作用证实了其形成,其中吲哚-3-羧甲醛与(3-苯基丙酰氨基)-乙酸的缩合反应是关键步骤。