作者:Takeshi Matsumoto、Akitami Ichihara、Mitsutoshi Yanagiya、Tamio Yuzawa、Akiyoshi Sannai、Hideaki Oikawa、Sadao Sakamura、Conrad Hans Eugster
DOI:10.1002/hlca.19850680827
日期:1985.12.18
process, 3-methoxyjuglone (= 8-hydroxy-2-methoxy-1,4-naphthoquinone; 9) has been synthesized from 1,2,4-trimethoxybenzene (5) and converted, after prenylation, to α-caryopterone (1; Scheme 1), a pyranojuglone pigment from Caryopteris clandonensis. On the other hand, juglone (= 5-hydroxy-1,4-naphthoquinone; 12) was regioselectively prenylated at C(2) via its 1-methoxy-cyclohexa-1,3-diene adduct 15(Scheme
通过一个简单的方法,由1,2,4-三甲氧基苯(5)合成了3-甲氧基juglone(= 8-羟基-2-甲氧基-1,4-萘醌; 9),并在异戊二烯化后转化为α-环戊烯酮(1;方案1),来自Caryopteris clandonensis的吡喃juglone颜料。另一方面,通过其1-甲氧基-环己-1,3-二烯加合物15 (方案2),在C(2)上对juglone(= 5-hydroxy-1,4-naphthoquinone; 12)进行区域选择性炔丙基化。如此形成的2-异戊烯基胡克隆酮(4)在氧化和其他反应后导致1。