pyrrolidine; iodine in dimethyl sulfoxide T=150°C; 24 h;

palladium diacetate; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1,4-di(diphenylphosphino)-butane in dimethyl sulfoxide T=120°C; P=3750.38 Torr; 16 h; Autoclave;

1: 4-oxo-4H-1-benzopyran With (2,2,6,6-tetramethylpiperidine)2Zn·2MgCl2·2LiCl in tetrahydrofuran T=-30°C; 1 h; Inert atmosphere; 2: 4-iodo-1,2-methylenedioxybenzene With bis(dibenzylideneacetone)-palladium(0); P(2-furyl)3 in tetrahydrofuran T=25°C; Negishi cross-coupling reaction; 1 h; Inert atmosphere; regioselective reaction;

NiO2 in 1,4-dioxane T=100°C; 18 h;

SPB; acetic acid T=50 - 60°C; 3 h; Green chemistry;

1H-1-hydroxy-5-methyl-1,2,3-benziodoxathiole 3,3-dioxide in methanol 24 h; Reflux;

thallium(III) nitrate 0.333333 h; Ambient temperature;

1: 78 percent / pyridine / 2 h 2: 50 percent / KOH / pyridine / 0.17 h / Heating 3: Tl(NO3)3*3H2O / 0.33 h / Ambient temperature View Scheme

1: 78 percent / pyridine / 2 h 2: 50 percent / KOH / pyridine / 0.17 h / Heating 3: Tl(NO3)3*3H2O / 0.33 h / Ambient temperature View Scheme

1: 50 percent / KOH / pyridine / 0.17 h / Heating 2: Tl(NO3)3*3H2O / 0.33 h / Ambient temperature View Scheme