Glycidyl esters in the presence of trifluoroacetic anhydride (TFAA) and trimethylsilyl halides (TMSX), undergo a regioselective opening of the oxirane system with a subsequent migration of the acyl group to afford 1-trifluoroacetyl-2-acyl-3-haloglycerols. From these, the corresponding 2-acyl-3-haloglycerols can be obtained quantitatively and in high purity (>99%) without chromatographic purification.
在存在
三氟乙酸酐(
TFAA)和三甲基
硅烷卤化物(TMSX)的情况下,
缩水甘油酯发生
环氧乙烷系统的区域选择性开环,随后酰基发生迁移,生成1-三
氟乙酰基-2-酰基-3-卤代
甘油。无需色谱纯化,即可从这些物质中定量、高纯度(>99%)地获得相应的2-酰基-3-卤代
甘油。