A new approach to phospholipid synthesis using tetrahydropyranyl glycerol: rapid access to phosphatidic acid and phosphatidylcholine, including mixed-chain glycerophospholipid derivatives
作者:Renato Rosseto、Niloufar Bibak、Joseph Hajdu
DOI:10.1039/b603788g
日期:——
A new synthesis of phosphatidicacid and phosphatidylcholine is reported, relying on the preparation of 3-tetrahydropyranyl-sn-glycerol as the key intermediate for sequential introduction of the primary and secondary acyl functions to produce chiral diglycerides that are phosphorylated to obtain the target phospholipid compounds.
The synthesis is based upon (1) the use of 3-p-toluenesulfonyl-sn-glycerol to provide the stereocenter for construction of the optically active lysophospholipid molecule, (2) tetrahydropyranylation of the secondary alcohol function to achieve orthogonal protection of the sn-2- and sn-3-glycerol positions, and (3) elaboration of the phosphodiester headgroup using a 2-chloro-1,3,2-dioxaphospholane/trimethylamine
报道了溶血磷脂酰胆碱的新的立体选择性合成。合成是基于(1)利用3- p -toluenesulfonyl- SN -甘油一种用于施工光学活性溶血磷脂分子的提供立构,(2)二级醇官能的tetrahydropyranylation来实现的正交保护SN - 2-和sn -3-甘油位置,以及(3)使用2-氯-1,3,2-二氧杂膦环/三甲胺序列精制磷酸二酯头基。在进行合成的过程中,发现sn -3- p的甲氧基乙酸酯置换-甲苯磺酸酯产生反应性甲氧基乙酰基酯,其随后可以用甲醇/叔丁胺选择性地裂解,而在sn -1位的酯基保持不受影响。已显示该序列适合于制备经光谱标记的溶血磷脂酰胆碱。这些化合物之一很容易转化为双标记的混合链磷脂酰胆碱,可用于脂解酶的实时荧光共振能量转移(FRET)分析。此外,这项工作还导致了新的合成策略,该策略基于在存在其他碱不稳定基团(例如FMOC衍生物)的情况下对甲苯磺酰基的化学选择性
Synthesis of mixed-chain phosphatidylcholines including coumarin fluorophores for FRET-based kinetic studies of phospholipase A2 enzymes
applicability to detect and measure catalytic PLA2 activity in tissues and cellular locations. Here we report a new synthesis of double-labeled phosphatidylcholine analogs with chain-terminal reporter groups including coumarin fluorophores for fluorescence resonance energy transfer (FRET)-based kinetic studies of PLA2 enzymes. The use of coumarin derivatives as fluorescent labels provides reporter groups