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Aryl-substituted α,β-difluoroallyl alcohols 1 were readily hydrolyzed in the presence of a catalytic amount of montmorillonite K 10 (clay) in hexane at reflux temperature for 1 h to give the corresponding (Z)-α-fluoro-β-aryl-substituted acrylaldehydes 2 in good yields.

2,3,3-Trifluoro-1-propenyl p -chlorobenzenesulfonate ( 1 ), readily available from 2,2,3,3-tetrafluoropropanol, reacted smoothly with various Grignard reagents at 50 °C to afford the corresponding (Z)-α,β-difluoroallyl alcohols 2 in moderate to excellent yields. These alcohols were smoothly hydrolyzed in the presence of a catalytic amount of montmorillonite K10 (Clay) to provide (Z)-α-fluoro-α,β-unsaturated aldehydes 3 in good yields.

2,3,3-Trifluoro-1-propenyl p -chlorobenzenesulfonate ( 1 ), readily available from 2,2,3,3-tetrafluoropropanol, reacted smoothly with various Grignard reagents at 50 °C to afford the corresponding (Z)-α,β-difluoroallyl alcohols 2 in moderate to excellent yields. These alcohols were smoothly hydrolyzed in the presence of a catalytic amount of montmorillonite K10 (Clay) to provide (Z)-α-fluoro-α,β-unsaturated aldehydes 3 in good yields.

Aryl-substituted α,β-difluoroallyl alcohols 1 were readily hydrolyzed in the presence of a catalytic amount of montmorillonite K 10 (clay) in hexane at reflux temperature for 1 h to give the corresponding (Z)-α-fluoro-β-aryl-substituted acrylaldehydes 2 in good yields.