4-Bromobenzaldehyde → 4'-Chloro[1,1'-biphenyl]-4-carbaldehyde

Beteiligte Stoffe

Reaktionsschritte

A mixture of 4-chlorobenzeneboronic acid (19.4 g, 1 equiv), 4-bromobenzaldehyde (22.9 g, 1 equiv), palladium(II) acetate (1.4 g, 0.05 equiv) aqueous sodium carbonate (30.3 g in 144 ml solution, 2 equiv) and dimethoxyethane (500 ml) was stirred at reflux under argon for 2.5 h, then evaporated to low volume and diluted with dichloromethane. Workup continued as in (a) above to give identical material (25.2 g, 94%). 1H-NMR (CDCl3) δ 10.05 (1H, s), 7.96 (2H, d), 7.73 (2H, d), 7.57 (2H, d), 7.46 (2H, d); MS (AP+) found (M+1)=217, C13H935ClO requires 216.

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