Regioselective Inversion of the Hydroxyl Group in <scp>d</scp>-<i>ribo</i>-Phytosphingosine via a Cyclic Sulfate and Bis-Sulfonate Intermediate
作者:Yun Mi Lee、Dong Jae Baek、Seokwoo Lee、Deukjoon Kim、Sanghee Kim
DOI:10.1021/jo101757k
日期:2011.1.21
The selective synthesis of d-xylo- and d-lyxo-phytosphingosines from commercially available d-ribo-phytosphingosine is described. Thermolysis of the N-carbonyl protected cyclic sulfate led to an inversion of configuration of the proximal hydroxyl group to give the xylo-isomer, whereas the corresponding bis-sulfonate resulted in an inversion of configuration of the distal hydroxyl group to give the lyxo-isomer
的选择性合成d - xylo-和d - L-来苏-phytosphingosines由市售d -核糖-phytosphingosine进行说明。热解的的Ñ羰基保护导致近端羟基的构的反转环状硫酸酯,得到木糖异构体,而相应的二磺酸酯导致在远端羟基的构型的转换,得到L-来苏-异构体。该研究允许在涉及羰基氧亲核试剂的分子内取代反应中比较环状硫酸盐和双磺酸盐。