7-Amino-3-bromo-2-phenyl-1-benzopyran-4-one → {1-[4-(7-Amino-4-oxo-2-phenyl-4H-1-benzopyran-3-yl)-phenyl]-cyclobutyl}-carbamic acid tert-butyl ester

Participants

Reaction Steps

Following the procedure used for {1-[4-(4-oxo-2-phenyl-4H-1-benzopyran-3-yl)phenyl]-cyclobutyl}-carbamic acid tert-butyl ester, 7-amino-3-bromo-2-phenyl-1-benzopyran-4-one (28.4 mg, 0.09 mmol) was reacted to give the title compound as a yellow solid (6.3 mg, 19%). 1H-NMR (400 MHz, CDCl3) δ 8.05 (d, 1H), 7.64 (d, 2H), 7.50 (d, 2H), 7.45 (d, 2H), 7.35 (dd, 1H), 7.31 (dd, 2H), 6.82 (d, 1H), 6.74 (s, 1H), 5.28 (bs, 1H), 4.11 (bs, 2H), 2.62-2.65 (m, 4H), 2.15-2.19 (m, 1H), 1.90-1.97 (m, 1H) 1.33 (bs, 9H).

Provenance & Evidence