An efficient synthesis of d-ribo- and l-lyxo-phytosphingosine from d-tartaric acid
作者:Xuequan Lu、Robert Bittman
DOI:10.1016/j.tetlet.2005.03.063
日期:2005.5
The preparations of d-ribo- and l-lyxo-phytosphingosines (1, 2) are described. Chelation-controlled addition of tetradecylmagnesium bromide to pentylidene-protected d-threitol aldehyde 6 afforded the key intermediate tetrol 7, providing the desired l-lyxo stereochemistry of phytosphingosine. Inversion at C4 of intermediate 7 provided the d-ribo stereochemistry.
D-的制剂核糖-和1- L-来苏-phytosphingosines(1,2)中有所描述。螯合控制的十四烷基溴化镁添加到亚戊基保护的d-苏糖醇醛6中,得到了关键的中间体四萜7,提供了植物鞘氨醇的所需l-lyxo立体化学。中间体7在C4处的转化提供了d-核糖立体化学。