Synthesis of 2-Geranyl- and 2-Farnesyl-Substituted Geranylgeraniols and Their Phosphates
作者:Hajime Nagano、Kaori Kudo
DOI:10.1246/bcsj.69.2071
日期:1996.7
Allylation of the lithiated cyclohexylimine of (2E,6E,10E)-geranylgeranial with (2E)-geranyl bromide followed by acid-catalyzed hydrolysis gave (2E)-α-, (2Z)-α-, and γ-geranyl-substituted geranylgeranials. Farnesyl-substituted geranylgeranials were also prepared. (2Z)-α-Geranyl- and (2Z)-α-farnesyl-substituted geranylgeranials were photoisomerized to the corresponding (2E)-isomers, respectively. The branched polyprenyl alcohols, obtained by the reduction of these aldehydes, were transformed to geranyl- and farnesyl-substituted geranylgeranyl phosphates.
(2E,6E,10E)-香叶基香叶醛的锂化环己基亚胺与(2E)-香叶基溴进行烯丙基化,然后进行酸催化水解,得到(2E)-α-、(2Z)-α-和γ-香叶基取代的香叶基香叶基。还制备了法尼基取代的香叶基香叶醛。 (2Z)-α-香叶基-和(2Z)-α-法呢基-取代的香叶基香叶醛分别光异构化为相应的(2E)-异构体。通过还原这些醛获得的支化聚异戊二烯醇被转化为香叶基和法呢基取代的香叶基香叶基磷酸酯。