1.1: trifluoromethanesulfonic anhydride; 2-chloropyridine / CH2Cl2 / -78 °C 1.2: 63 percent / CH2Cl2; tetrahydrofuran / -78 °C 2.1: 99 percent / ammonium hexafluorophosphate; 2-dicyclohexylphosphino-2',6'-dimethoxy-1,1'-biphenyl / CpRuCl(PPh3)2 / toluene / 105 °C View Scheme

1: nitric acid 2: aqueous sulfuric acid 3: nitric acid 4: diethyl ether; ethanolic NaOH-solution 5: SnCl2; aq.-ethanolic HCl / anschliessend Behandeln mit wss. KOH View Scheme

1: N-bromo-succinimide; benzene; sodium acetate 2: nitric acid 3: aqueous sulfuric acid 4: nitric acid 5: diethyl ether; ethanolic NaOH-solution 6: SnCl2; aq.-ethanolic HCl / anschliessend Behandeln mit wss. KOH View Scheme

1: aqueous sulfuric acid 2: nitric acid 3: diethyl ether; ethanolic NaOH-solution 4: SnCl2; aq.-ethanolic HCl / anschliessend Behandeln mit wss. KOH View Scheme

1: 97 percent / Et3N / tetrahydrofuran / 24 h / Ambient temperature 2: 79 percent / m-chloroperbenzoic acid / CH2Cl2 / 42 h / 39 °C 3: 24 h / 140 °C 4: 1 M aq. Na2CO3 / acetone / 2 h / 40 °C View Scheme

1: 79 percent / m-chloroperbenzoic acid / CH2Cl2 / 42 h / 39 °C 2: 24 h / 140 °C 3: 1 M aq. Na2CO3 / acetone / 2 h / 40 °C View Scheme

in water; acetic acid 0.05 - 0.0583333 h; Microwave irradiation;

anschliessend mit wss. Kalilauge behandeln;