Nitrogen → HCID 58318519, compound

Participants

Reaction Conditions

Reaction Steps

(The following reaction is done in an oxygenfree N2 atmosphere.) Dissolve tetrakis-(triphenylphosphine)-palladium(0) (29 mg, 2.5 mol %) and nitrile (83) (101 mg, 0.50 mmol) in DME (3.7 mL). The reaction mixture is degassed 5 times and flooded with N2 again. Add 2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)phenylamine (84) (120 mg, 0.55 mmol), rinse with DME (0.5 mL), add aqu. 1M NaHCO3, degas again (5 times) and stir the reaction solution 2 h at 90° C. (reflux). After cooling to rt partition the reaction mixture between EtOAc and brine (1+1) and extract the separated aqueous layer 3 times with EtOAc. Wash combined organic layer with brine and dry with Na2SO4. Remove solvent under reduced pressure and purify the crude product by preparative radial chromatography (silica gel 60PF, CyH/EtOAc 2+1) to obtain [5-(2-amino-phenyl)-thiophen-2-yl]-acetonitrile (85) as a brownish oil (84 mg, 78%). 1H NMR (400 MHz, CDCl3): 3.89 (br.s, 2H); 5.20-6.50 (br.s, 2H); 6.92 (t, 1H; J=7.6 Hz); 6.95-7.00 (m, 1H); 6.99 (d, 1H; J=3.8 Hz); 7.11 (d, 1H; J=3.8 Hz); 7.21 (dd, 1H; J1=7.6 Hz, J2=1.3 Hz); 7.27 (dd, 1H; J1=7.6 Hz, J2=1.3 Hz).

Provenance & Evidence