p-Toluenesulfonic acid → N-(4-Chlorobenzylidene)-4-carboxybenzenesulfonamide

Participants

Reaction Steps

In a similar manner to Example 2, 4.00 g (29 mmol) of 4-chlorobenzaldehyde, 5.72 g (29 mmol) of 4-carboxybenzenesulfonamide and 20 mg of TsOH in 150 mL of toluene were heated for 24 hours to provide 6.60 g (71%) of SULF-3 as a light tan powder: IR (Nujol) 3400-2500 (br), 1685, 1595, 1285, 1215, 1005 cm-1 ; 1H NMR (DMSO-d6, TMS ext std) δ 9.15 (s, 1), 8.2-7.3 (m, 8).

Provenance & Evidence