反应详情

The ester prepared as described above in (a) was converted to the title acid in a manner analogous to example 11(b). The acid possessed νmax (nujol) 1690, 1670, 1599, 1580, 1575,cm-1, δ(CH3OD|D6DMSO) 3.78 (3H,s,--OMe), 7.00 (2H,d,J9 Hz, protons o to --OMe), 7.66 (2H,d,J9 Hz, protons m to --OMe), 8.45(1H,s, C3 -pyrazole proton). Found: M30, 234.0639; C11H10N2O4 requires M,234.0641.