structure, “glut-5(10)-en-1-one”, proposed for a new triterpene from Euphorbia nerifolia, this ketone (≡ D : B-friedoolean-5(10)en-1-one) was prepared. Oxidation of D : B-friedoolean-5(10)-ene with chromium trioxide-pyridine complex gave the allylic oxidation products, D : B-friedoolean-5(10)-en-1-one, D : B-friedoolean-5(10)-en-6-one, and D : B-friedoolean-5(10)-ene-1,6-dione. The spectral data and physical
为了检查结构,“glut-5(10)-en-1-one”,提出了一种来自大戟属植物的新三萜,这种酮 (≡ D : B-friedoolean-5(10)en-1-one ) 准备好了。D : B-friedoolean-5(10)-ene 与
三氧化铬-
吡啶络合物的氧化得到烯丙基氧化产物,D : B-friedoolean-5(10)-en-1-one, D : B-friedoolean-5 (10)-en-6-one,和 D:B-friedoolean-5(10)-ene-1,6-dione。合成酮(D : B-friedoolean-5(10)-en-1-one)的光谱数据和物理常数与新三萜的光谱数据和物理常数不同;这需要修改这种天然三萜的结构。还描述了 D : B-friedoolean-5(10)-en-3-one 烯醇
乙酸酯在相同条件下氧化得到 D: B-friedoolean-1