Table 3.
Scope of β-aryl, β-fluoro Michael acceptors
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Standard reaction conditions: 0.5 mmol 16-30a, 3.0 equiv Et3N· 3HF, 1.0 equiv p-CI BA, 5 mol % RuPhosAuCl, 5 mol % AgBF4, 4:1 MeCN:CH2CI2 [0.7M], rt, 24 h.
16-30b isolated as a single isomer.
Determined by 19F NMR spectroscopy with PhF as an internal standard.
1.43 M, 45 °C.
45 °C.
4.5 mmol.
1.25 M, 55 °C, 4.0 equiv Et3N·3HF.
45 °C, 48 h, 4.0 equiv Et3N·3HF.