A novel sesquiterpene peroxide from Alpinia japonica (Thunb.) MIQ.
作者:HIDEJI ITOKAWA、KINZO WATANABE、HIROSHI MORITA、SUSUMU MIHASHI、YOICHI IITAKA
DOI:10.1248/cpb.33.2023
日期:——
A novel sesquiterpene peroxide, hanalpinol (1a), has been isolated from the rhizomes of Alpinia japonica. Oxidation of 1a with pyridinium chlorochromate gave a crystalline, α, β-unsaturated ketone (2), whose structure was established by means of X-ray analysis. The IR spectrum of 1a revealed the presence of intramolecular hydrogen bonding, and acid treatment of 1a resulted in the formation of furopelargone B (4), which was present naturally in the same plant. This conversion reaction suggests that 4 is biosynthesized from 1a or its analog. Furopelargone A (3) was also isolated.
从日本高山植物的根茎中分离出了一种新型倍半萜过氧化物--hanalpinol(1a)。用吡啶鎓氯铬酸盐氧化 1a 后,得到了结晶的 α、β-不饱和酮(2),并通过 X 射线分析确定了其结构。1a 的红外光谱显示存在分子内氢键,对 1a 进行酸处理后可生成呋喃贝酮 B(4),这种物质天然存在于同一种植物中。这一转化反应表明 4 是由 1a 或其类似物生物合成的。此外,还分离出了呋喃苯丙酮 A(3)。