A simple and low cost synthesis of d-erythro-sphingosine and d-erythro-azidosphingosine from d-ribo-phytosphingosine: glycosphingolipid precursors
作者:Richard J.B.H.N. van den Berg、Cornelis G.N. Korevaar、Gijsbert A. van der Marel、Herman S. Overkleeft、Jacques H. van Boom
DOI:10.1016/s0040-4039(02)01807-5
日期:2002.11
yield of 58% and 70%, respectively. A key transformation in the synthesis of d-erythro-sphingosine (1) is the palladium catalyzed regiospecific reduction of the Z-enol triflate 9. A crucial step in the synthesis of azidosphingosine 2 comprises a regio- and stereoselective in situ trans-elimination of the 4-O-triflate of azidophytosphingosine 13.
d-赤型-鞘氨醇(1)和d-赤型-2-叠氮鞘氨醇(2)均由市售和廉价的d-核糖-植物鞘氨醇(3)制备,产率分别为58%和70%。d-赤型-鞘氨醇(1)合成中的关键转变是钯催化的Z-烯醇三氟甲磺酸9的区域特异性还原。叠氮鞘氨醇2合成的关键步骤包括叠氮鞘氨醇4- O-三氟甲磺酸的区域选择性和立体选择性原位反式消除13。