A new approach to the stereoselective total synthesis of isotopically labeled d-ribo-phytosphingosine
作者:Shengrong Li、Jihai Pang、William K Wilson、George J Schroepfer
DOI:10.1016/s0957-4166(99)00161-5
日期:1999.5
stereoselective total synthesis of d-ribo-[1,1-2H-1,2-13C]phytosphingosine (12). Chirality at the incipient C-4 position was derived from asymmetric dihydroxylation of 1-hexadecene. The remaining chiral centers were formed by Sharpless epoxidation of an allylic alcohol, followed by benzoylcarbamate cyclization to furnish a 2-amino-1,3,4-triol derivative with the desired stereochemistry. The 2H and 13C labels
我们描述D-的新型立体选择性全合成核糖- [1,1- 2 H-1,2- 13 C]植物鞘氨醇(12)。最初的C-4位的手性来自1-十六碳烯的不对称二羟基化反应。其余的手性中心是通过烯丙基醇的Sharpless环氧化,然后苯甲酰氨基甲酸酯环化以提供具有所需立体化学的2-氨基-1,3,4-三醇衍生物而形成的。的2 H和13 C ^标签通过的霍纳-埃蒙斯缩合引入13 C标记的膦酰基乙酸三,接着还原所得的羧酸酯与氯化铝的3 / LiAlD 4。质谱结果表明12作为同位素稀释法分析的内标物的适用性。