(4-Chlorophenyl)acetic acid → (4-Chlorophenyl)acetic acid tert-butyl ester

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a suspension of N,N-dimethyl-formamide-di-tert-butyl acetal (25 ml, 104.4 mmol) in dry toluene (90 ml) was added p-chlorophenyl acetic acid (5.94 g, 34.8 mmol) and the whole heated at 80° C. for 1 h. The mixture was diluted with EtOAc (50 ml) and washed with water (50 ml), 3% aqueous NaHCO3 solution (50 ml) and brine (20 ml) and then dried over MgSO4 and evaporated to give an oil. This oil was purified using 35%, then 50% DCM in pentane to give the title product (2.4 g, 30%); 1HNMR (400 MHz, CDCl3) δ: 1.42 (s, 9H), 3.44 (s, 2H), 7.20 (d, 2H), 7.28 (d, 2H).

Herkunft & Nachweise