Table 2 Spectral data of the coumarin derivatives 6–8

From: 3-Bromophenyl 6-acetoxymethyl-2-oxo-2H-1-benzopyran-3-carboxylate inhibits cancer cell invasion in vitro and tumour growth in vivo

Compound

IR (KBr) (cm−1)

1H NMR (80 MHz, DMSO-d6, HMDS) δ (p.p.m.)

6

3066 (C–H aromatic); 1735 (C=O ester and lactone); 1629; 1580; 1486; 1363; 1247

2.05 (s, 3H, CH3), 5.1 (s, 2H, CH2), 7–7.95 (m, 7H, 5-H, 7-H, 8-H, 2′-H, 4′-H, 5′-H, 6′-H), 9.0 (s, 1H, 4-H)

7

3070 (C–H aromatic); 1735 (C=O ester and lactone); 1628; 1579; 1470; 1367; 1246

2.0 (s, 3H, CH3), 5.15 (s, 2H, CH2), 7.25–7.95 (m, 7H, 5-H, 7-H, 8-H, 2′-H, 4′-H, 5′-H, 6′-H), 9.0 (s, 1H, 4-H)

8

3065 (C–H aromatic); 1762 (C=O ester); 1722 (C=O lactone); 1623; 1575; 1466; 1376; 1248

2.1 (s, 3H, CH3), 5.1 (s, 2H, CH2), 7.15–7.9 (m, 7H, 5-H, 7-H, 8-H, 2′-H, 4′-H, 5′-H, 6′-H), 8.95 (s, 1H, 4-H)

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