Synthesis and NMR Characterization of (<i>Z</i>,<i>Z</i>,<i>Z</i>,<i>Z</i>,<i>E</i>,<i>E</i>,ω)-Heptaprenol
作者:Dusan Hesek、Mijoon Lee、Jaroslav Zajíček、Jed F. Fisher、Shahriar Mobashery
DOI:10.1021/ja306184m
日期:2012.8.22
describe a practical, multigram synthesis of (2Z,6Z,10Z,14Z,18E,22E)-3,7,11,15,19,23,27-heptamethyl-2,6,10,14,18,22,26-octacosaheptaen-1-ol [(Z(4),E(2),ω)-heptaprenol, 4] using the nerol-derived sulfone 8 as the key intermediate. Sulfone 8 is prepared by the literature route and is converted in five additional steps (18% yield from 8) to (Z(4),E(2),ω)-heptaprenol 4. The use of Eu(hfc)(3) as an NMR shift
Stereoselective total synthesis of (S)-(–)-dolichol-20
作者:Seiichi Inoue、Toshihiko Kaneko、Yuichi Takahashi、Osamu Miyamoto、Kikumasa Sato
DOI:10.1039/c39870001036
日期:——
A stereoselectivesynthesis of (S)-(–)-dolichol-20 (1a) was achieved using (Z,Z,Z,Z,Z,Z,Z,Z,E,E)-undercaprenol (11), the C20 block (5), and the optically active C25 block (3) as the key building blocks.