pyridine-2-carboxylic acid, Ag(II) salt in water; benzene Ambient temperature;

1: 85 percent / acetic acid / 42.5 h / Ambient temperature 2: 95 percent / potassium phenylselenite, dipotassium hydrogen phosphate, 18-crown-6 / acetonitrile / 20 h / Heating 3: 65 percent / NaOH, TEBA / tetrahydrofuran / 5.5 h / Ambient temperature 4: 77 percent / silver(II) dipicolinate / benzene; H2O / Ambient temperature View Scheme

1: 65 percent / NaOH, TEBA / tetrahydrofuran / 5.5 h / Ambient temperature 2: 77 percent / silver(II) dipicolinate / benzene; H2O / Ambient temperature View Scheme

1: 95 percent / potassium phenylselenite, dipotassium hydrogen phosphate, 18-crown-6 / acetonitrile / 20 h / Heating 2: 65 percent / NaOH, TEBA / tetrahydrofuran / 5.5 h / Ambient temperature 3: 77 percent / silver(II) dipicolinate / benzene; H2O / Ambient temperature View Scheme