p-Chlorobenzenesulfonic acid → p-Toluenesulfonic acid monohydrate

Beteiligte Stoffe

Reaktionsschritte

The general procedure described in Example 3 was used with 4-chlorobenzenesulfonic acid (192 mg, 1.00 mmol), methylboronic acid (90 mg, 1.50 mmol), Pd(OAc)2 (2.2 mg, 0.010 mmol, 1 mol %), sodium 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl-3′-sulfonate (10.0 mg, 0.020 mmol, 2 mol %), K2CO3 (414 mg, 3.00 mmol), water (2.0 mL), 12 h, 100° C. The product was isolated as a white solid (207 mg, 99%). Mp=104° C. (lit.=106° C.). 1H NMR (400 MHz, d4-MeOH) δ: 7.71 (d, 2H, J=8.4 Hz), 7.24 (d, 2H, J=8.4 Hz), 5.08 (s, H2O), 2.37 (s, 3H)). 13C NMR (125 MHz, d4-MeOH) δ: 143.3, 142.0, 130.0, 127.1, 21.4.

Herkunft & Nachweise