作者:L. Delon、P. Laurent、H. Blancou
DOI:10.1016/j.jfluchem.2005.07.013
日期:2005.12
We describe here a new synthesis of racemic α-amino acids containing polyfluorinated aliphatic long chain RF(CH2)3Y (RF = C2F5, C6F13, C8F17) (Y = CH(NH2)COOH) based on Sörensen's method. The radical addition of perfluoroalkyl iodides RFI (RF = C2F5, C6F13, C8F17) at room temperature to ethyl-2-carbetoxy-2-phthalimido-pent-4-enoate 3 was first initiated by Et3B/O2. Then, the reduction of adducts 4a–c
我们在这里描述了一种新的外消旋α-氨基酸的合成方法,该氨基酸包含多氟化脂肪族长链R F(CH 2)3 Y(R F = C 2 F 5,C 6 F 13,C 8 F 17)(Y = CH(NH 2)COOH)基于Sörensen的方法。在室温下将全氟烷基碘化物R F I(R F = C 2 F 5,C 6 F 13,C 8 F 17)自由基加成到2-乙氧羰基2-邻苯二甲酰亚胺基戊4-烯酸酯3首先由Et 3 B / O 2引发。然后,在温和的条件下,使用Et 3 B / O 2 / Bu 3 SnH还原加合物4a – c会生成2-乙氧基-2-邻苯二甲酰亚胺基5 –全氟烷基-戊酸乙酯5a – c。研究了使用Et 3 B / O 2优化碘氟烷基化步骤的实验条件。最后,对5a – c进行脱保护得到所需产物6a – c,收率很高。