3-(Methylcarbamoyl)benzeneboronic acid → 3-(2'-amino-1'-methyl-5'-oxo-2-phenyl-1',5'-dihydrospiro[chroman-4,4'-imidazole]-6-yl)-N-methylbenzamide

関与物質

反応条件

反応手順

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-(methylcarbamoyl)phenylboronic acid (18.6 mg, 0.104 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 and preparative HPLC to give pure 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N-methylbenzamide (0.96 mg, 4%). 1H-NMR (CDCl3): 2.36 (d, 1H), 2.57 (t, 1H), 2.73 (s, 3H), 2.97 (s, 3H), 5.87 (d, 1H), 7.11 (m, 2H), 7.45 (m, 8H), 7.51 (m, 1H), 7.60 (s, 1H), 7.78 (s, 1H).

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