Cesium carbonate → 2-Amino-6-cyclopropylbenzonitrile

Participants

Reaction Steps

To a degassed solution of 2-amino-6-bromobenzonitrile (851 μmol, 168 mg), 2,2-dimethylcyclopropylboronic acid (1.106 μmol, 126 mg) (Example 270b), and Cs2CO3 (2.979 mmol, 970 mg) in DME (3.4 mL) and water (850 μL) was added tetrakis(triphenylphosphino)palladium(0) (43 μmol, 50 mg) under nitrogen and the reaction mixture microwaved for 2 hours at 160° C. The reaction mixture was cooled to room temperature and extracted with EtOAc (3×5 mL). The combined organic layers was washed once with brine (5 mL), dried over sodium sulfate, filtered and evaporated. The crude product was purified on silica gel (EtOAc/hexanes 10%-40%) to give the desired product (71 mg, 45%) as a waxy, yellow solid. 1H NMR (400 MHz, CDCl3) δ 0.82 (m, 1H), 0.82 (s, 3H), 0.85 (m, 1H), 1.33 (s, 3H), 1.92 (m, 1H), 4.36 (br. s, 2H), 6.47 (d, J=8 Hz, 1H), 6.56 (d, J=8 Hz, 1H), 7.20 (t, J=8 Hz, 1H).

Provenance & Evidence