In Situ Generation of 3,3,3-Trifluoropropanal and Its Use for Carbon−Carbon Bond-Forming Reactions
作者:Takashi Yamazaki、Rei Kobayashi、Tomoya Kitazume、Toshio Kubota
DOI:10.1021/jo052434o
日期:2006.3.1
The DIBAL reduction of 2-phenylethyl 3,3,3-trifluoro-2-methylpropionate 2 at −78 °C afforded the aluminum acetal 3, and this intermediate, on worming up to 0 °C, was found to slowly decompose into the corresponding aldehyde 4, which smoothly reacted with appropriate nucleophiles in a one-pot manner in good to excellent yields with up to 93% diastereoselectivity.
在-78°C下通过DIBAL还原2-苯基乙基3,3,3-三氟-2-甲基丙酸酯2可获得铝缩醛3,发现该中间体在蠕动至0°C时会缓慢分解为相应的醛4,它与适当的亲核试剂以一锅法顺利反应,产率高至优异,非对映选择性高达93%。