Methyl 3-boronobenzenesulfonamide → 3-(2'-amino-1'-methyl-5'-oxo-2-phenyl-1',5'-dihydrospiro[chroman-4,4'-imidazole]-6-yl)-N-methylbenzenesulfonamide

Participants

Reaction Conditions

Reaction Steps

Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(N-methylsulfamoyl)phenylboronic acid (23 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N-methylbenzenesulfonamide (5.88 mg, 24%). 1H-NMR (MeOD): 2.16 (m, 1H), 2.22 (m, 1H), 2.41 (m, 3H), 3.15 (m, 3H), 5.21 (m, 0.2H), 5.83 (m, 0.8H), 6.98 (m, 1H), 7.16 (m, 1H), 7.25 (m, 1H), 7.32 (m, 2H), 7.38 (m, 2H), 7.42 (m, 1H), 7.51 (m, 1H), 7.66 (m, 2H), 7.86 (m, 1H).

Provenance & Evidence