1.1: ethyl acetate / 5 h / 20 °C 2.1: 4.04 g / aq. Na2CO3 / CH2Cl2 / 1.5 h / 20 °C 3.1: PCl5; pyridine / CH2Cl2 / 1.5 h / 8 - 10 °C 3.2: MeOH / CH2Cl2 / 1.25 h / -20 - -10 °C 3.3: 90 percent / H2O / -50 °C 4.1: 92.4 percent / N,N-dimethylaniline; POCl3 / CH2Cl2 / 1.5 h / -15 - -10 °C 5.1: TFA; anisole / CH2Cl2 / 0 - 5 °C 6.1: 2.54 g / aq. HCOOH / 3 h / 20 °C View Scheme