作者:Xuechao Xing、Alfio Fichera、Krishna Kumar
DOI:10.1021/ol015567e
日期:2001.5.1
[reaction in text] A novel, short, and efficient synthesis of (S)-5,5,5,5',5',5'-hexafluoroleucine (6) in greater than 99% ee starting from the protected oxazolidine aldehyde 1 is described. The enantiomeric excess of the product was calculated from an NMR analysis of a dipeptide formed by reaction with a protected L-serine derivative. Furthermore, a racemic sample of N-acylated hexafluoroleucine was
[案文中的反应]从受保护的恶唑烷醛1开始,以大于99%ee的方式,新颖,短而有效地合成(S)-5,5,5,5',5',5'-六氟亮氨酸(6)描述。通过与受保护的L-丝氨酸衍生物反应形成的二肽的NMR分析,计算出产物的对映体过量。此外,通过用猪肾酰基转移酶I处理,消解了N-酰化的六氟亮氨酸的外消旋样品,并发现其旋光度与合成样品6相同。