作者:Takashi Matsumoto、Sachihiko Imai、Shoji Takeda、Masanori Mitsuki
DOI:10.1246/bcsj.56.2013
日期:1983.7
The structures of nellionol and dehydronellionol were revised respectively to 6α,11,12,16-tetrahydroxyabieta-8,11,13-trien-7-one (12) and 6,11,12,16-tetrahydroxyabieta-5,8,11,13-tetraen-7-one (13) by the following syntheses. A mixture of (15R)- and (15S)-12-methoxyabieta-8,11,13-trien-16-ol, prepared from 13-acetyl-12-methoxypodocarpa-8,11,13-triene, was converted into 11,12,16-triacetoxyabieta-8,11,13-trien-7-one (22) via 16-acetoxy-12-benzoyloxyabieta-8,11,13-trien-11-ol. Treatment of 22 with isopropenyl acetate, followed by oxidation with m-chloroperbenzoic acid and subsequent acetylation, afforded 6α, 11,12,16-tetraacetoxyabieta-8,11,13-trien-7-one, which was hydrolyzed with dilute hydrochloric acid to 12. The ketone 22 was also converted into 13 via 11,12,16-triacetoxyabieta-8,11,13-trien-6-one. The spectral data of 12 and 13 were in good agreement with those of natural nellionol and dehydronellionol.
通过以下合成方法,将内六烯醇和脱水内六烯醇的结构分别修正为 6α,11,12,16-四羟基阿松香-8,11,13-三烯-7-酮 (12) 和 6,11,12,16-四羟基阿松香-5,8,11,13-四烯-7-酮 (13)。由 13-acetyl-12-methoxypodocarpa-8,11,13-triene 制备的 (15R)- 和 (15S)-12-methoxyabieta-8,11,13-trien-16-ol 混合物通过 16-acetoxy-12-benzoyloxyabieta-8,11,13-trien-11-ol 转化为 11,12,16-三乙酰氧基阿松香-8,11,13-三烯-7-酮 (22)。用乙酸异丙烯酯处理 22,然后用间氯过苯甲酸氧化,再进行乙酰化,得到 6α,11,12,16-四乙酰氧基阿松香-8,11,13-三烯-7-酮,用稀盐酸水解得到 12。酮 22 也通过 11,12,16-三乙酰氧基阿松香-8,11,13-三烯-6-酮转化为 13。12 和 13 的光谱数据与天然橙皮烯醇和脱水橙皮烯醇的光谱数据十分吻合。