A formylation strategy: tert‐Leucine derived organocatalysts promote the enantioselective 1,2‐addition of FTBH to fluorinated ketones to afford quaternary β‐hydroxy β‐fluoromethyl diazenes in excellent yields and moderate‐to‐good enantioselectivities. Subsequent high‐yielding and racemization‐free transformations provide an expedient entry to enantioenriched azoxy compounds, aldehydes and derivatives
甲酰化策略: 叔亮
氨酸衍生的有机催化剂促进FTBH向
氟化酮的对映选择性1,2-加成反应,从而以优异的收率和中等至良好的对映选择性提供季β-羟基β-
氟甲基二氮。随后的高产率和无外消旋转化为对映体富集的乙氧基化合物,醛及其衍
生物提供了便利的入口。