References
- Vogel , A. I. 1975 . A Text book of practical organic chemistry , 682 – 683 . London : Longman group Limited .
- Minton , T. H. 1922 . J. Chem. Soc. , 121 : 1591
- Ingham , B. 1931 . J. Chem. Soc. , : 897
- Gelbard , G. 1977 . Synthesis , : 113
- KoeLsch , C. F. 1931 . J. Am. Chem. Soc. , 53 : 304
- M.P. 214–216°; NMR(d6-DMSOσ) σ; 5.7(2H, s, -CH2-), 7.5(5H, m, aromatic and olefinic-H), 12.2(1H, bs,-COOH)
- M.P. 270°; NMR(d6-DMSO) σ; 1.32(3H, t, J=7Hz, -CH3), 4.27(2H, q, J=7HZ, O-CH2-), 4.9(2H, s, -CH2-COOH), 6.9(2H, d, J=8.5 Hz, aromatic-H meta to ester group), 7.86(2H, d, J=8.5 Hz, aromatic-H ortho to ester group), 10.9(1H, bs, COOH). The preparation of this derivative by traditional method is not possible due to the hydrolysis of ester group in the substrate