反应详情

Pd(PPh3)4 (27 mg, 0.072 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-2-(3-chlorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (30 mg, 0.072 mmol) in toluene (5 mL), Na2CO3 (2 N, 2 mL), and 4-cyanophenylboronic acid (12.9 mg, 0.088 mmol). The mixture was refluxed under Ar overnight. The reaction mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC followed by preparative HPLC to give pure 3-(2′-amino-2-(3-chlorophenyl)-1′-methyl-5′-oxo-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (1.03 mg, 3%). 1H-NMR (MeOD): 2.63 (m, 2H), 3.22 (s, 3H), 5.34 (m, 1H), 7.18 (m, 1H), 7.41 (m, 3H), 7.54 (m, 2H), 7.10 (m, 1H), 7.17 (m, 2H), 7.89 (m, 1H), 7.98 (m, 1H).

1. temperatureThe mixture was refluxed under Ar overnight
2. concentrationThe reaction mixture was concentrated in vacuo
3. customto give a residue, which
4. customwas purified by preparative TLC