A novel route to d-erythro-sphingosine and related compounds from mono-O-isopropylidene-d-xylose or -d- galactose
作者:Makoto Kiso、Akemi Nakamura、Yoshimi Tomita、Akira Hasegawa
DOI:10.1016/0008-6215(86)84009-5
日期:1986.12
Abstract An efficient synthesis of d - erythro -sphingosine and -ceramide from d -xylose or d -galactose is described. A mixture of 2,4- O -isopropylidene- d -threose and its formate, which is available in one step from 3,5- O -isopropylidene- d -xylofuranose or 4,6- O -isopropylidene- d -galactopyranose, was subjected to the Wittig alkenation with triphenylphosphonio-tetra- and -hexa-decylid. The
摘要描述了由d-木糖或d-半乳糖有效合成d-赤型-鞘氨醇和-神经酰胺的方法。2,4-O-异亚丙基-d-苏糖及其甲酸酯的混合物是一步合成的,该混合物可从3,5-O-异亚丙基-d-木呋喃糖或4,6-O-异亚丙基-d-吡喃半乳糖中得到。用三苯基膦基四-和-十六-癸基进行Wittig链化。通过在C-2处引入叠氮基并将叠氮化物选择性还原,分别将所得的1,3- O-异丙基亚甲基化的C 18和C 20烯烃转化为相应的1,3- O-保护的鞘氨醇具有2(S),3(R)-d-赤型构型,通过与硬脂酰基或木质素酰基的N-酰化序列,并水解除去异亚丙基,从中制备了多种神经酰胺。