Total synthesis of (2S,3S,4R)-2-[(2′R)-2-benzoyloxydocosanoylamino]-16-methylheptadecane-1,3,4,-triol 3,4-dibenzoate, a partially protected ceramide part of sponge cerebrosides
作者:Hideki Nakashima、Norihiko Hirata、Takeru Iwamura、Yoshiro Yamagiwa、Tadao Kamikawa
DOI:10.1039/p19940002849
日期:——
eptadecane-1,3,4-triol 3,4-dibenzoate 32, a partially protected ceramide part of a cerebroside from the marine sponge Halichondria japonica, has been synthesized from L-ascorbic acid, and its absolute stereochemistry has been determined. The key steps in the synthesis include the regioselective ring opening of chiral epoxide 5 with a 2-alkyl-2-lithio-1,3-dithiane and the introduction of a hydroxymethylene
(2小号,3小号,4 - [R)-2 - [(2' - [R)-2- Benzoyloxydocosanoylamino] -16-methylheptadecane -1,3,4-三醇-3,4-二苯甲酸酯32,一个的部分保护的神经酰胺部分从海洋海绵哈立克氏菌中提取的脑苷脂是由L-抗坏血酸合成的,其绝对立体化学已经确定。合成的关键步骤包括用2-烷基-2-硫代-1,3-二硫杂环丁烷手性环氧化物5的区域选择性开环,并使用Dondoni的方法引入羟甲基合成子以组装C(1)和C(2 )功能。