Sphingosine, sphinganines and phytosphingosines and their analogs were synthesized by an aldol condensation between an iminoglycinate bearing a (+)-(1R,2R,5R)-2-hydroxy-3-pinanone group as chiral auxiliary and an appropriate aldehyde. All condensations proceeded with excellent enantioselectivity to generate the (2S,3R)-D-erythro structures in good yields.
鞘氨醇,
鞘氨醇和
植物鞘氨醇及其类似物是通过带有(+)-(1R,2R,5R)-2-羟基-3-
吡喃酮基作为手性助剂的
亚氨基甘氨酸酸酯与适当的醛之间的醛醇缩合合成的。所有缩合以优异的对映选择性进行,以高收率产生(2S,3R)-D-赤型结构。