(3-(Acetamidomethyl)phenyl)boronic acid → N-(3-(2'-amino-1'-methyl-5'-oxo-2-phenyl-1',5'-dihydrospiro-[chroman-4,4'-imidazole]-6-yl)benzyl)acetamide

Participants

Reaction Conditions

Reaction Steps

Pd(PPh3)2Cl2 (10 mg) in a 10 mL CEM test tube 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-(acetamidomethyl)phenylboronic acid (19.3 mg, 0.1 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure N-(3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro-[chroman-4,4′-imidazole]-6-yl)benzyl)acetamide (2.5 mg, 11%). 1H-NMR (MeOD): 2.01 (s, 3H), 2.16 (d, 1H), 2.32 (t, 1H), 3.17 (s, 3H), 4.40 (s, 2H), 5.92 (d, 1H), 7.03 (d, 1H), 7.23 (d, 2H), 7.36 (m, 2H), 7.41 (t, 4H), 7.48 (m, 3H).

Provenance & Evidence