Table 1.
Compd. No. | m.p. | δ 1H-NMR | δ 13C-NMR | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
C5-H | C3-H | C2-H | C3-H3 | C2-CH3 | C-5 | C-3 | C-2 | C3-CH3 | C2-CH3 | ||
6 | 264–265 | 9.15 | – | – | – | 2.55 | 159.30 | 160.50 | 11.60 | ||
7 | 275–277 | 9.35 | – | – | 2.80 | – | 162.00 | 164.27 | 13.60 | ||
8 | 257–259 | 9.20 | – | 9.00 | – | – | 157.99 | 158.66 | |||
9 | 290–292 | 9.40 | 9.25 | – | – | – | 160.05 | 161.90 |