作者:Toshimasa Katagiri、Koichi Kutose、Naoya Shimokawa、Norihiko Kusunoki、Kenji Uneyama
DOI:10.1016/s0040-4020(99)00498-6
日期:1999.7
A five-step preparation of 2-benzoyloxy-3,3,3-trifluoropropanal from 1,2-epoxy-3,3,3-trifluoropropane via Pummerer rearrangement is described. The total yield of the aldehyde from the epoxide was 90%. The aldehyde kept its optical purity when it was in hydrate form, but it was found to readily racemize in its formyl form. The utilization of selenium instead of sulfur in these procedures offered advantages
描述了通过Pummerer重排从1,2-环氧-3,3,3-三氟丙烷由五步制备2-苯甲酰氧基-3,3,3-三氟丙醛。醛从环氧化物的总产率为90%。当醛为水合物形式时,其醛保持其光学纯度,但发现其以甲酰基形式易于消旋。在这些程序中利用硒代替硫可为杂原子的可控氧化提供Pummerer重排以及随后的Pummerer产物(一种醛当量)的水解提供了优势。