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Ferulic Acid structure determination

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1HNMR (500 MHz, CDCl3, J in Hz) δ: 3.58 (3H, s, H-4’), 6.24 (1H, d, J=15 Hz, H-2’), 6.93 (1H, d, J=9 Hz, H-6), 7.16 (1H, dd, J=8 and 2 Hz, H-5), 7.04 (1H, d, J=2 Hz, H-3), 7.65 (1H, d, J=15 Hz, H-1’).1HNMR spectrum showed the characteristic signal for a methoxy group at δ 3.58 (s). The compound spectrum also showed three aromatic protons at δ 6.93 (d; J=9 Hz), 7.14 6(dd; J=8 and 2 Hz), and 7.04(d; J=2 Hz), characteristics for the H-6, H-5, and H-3 of aromatic part of isolated compound. The presence of further two proton doublets with J= 15 Hz at δ 6.24 and 7.65 suggests the presence of H-2’ and H-1’ in the side chain of compound respectively.The EI-MS analyzed a molecular ion peak at m/z 194 (M+, base peak) is suggested with the proposed structure of the known phenolic compound, ferulic acid, with C10H10O4 molecular formula.

Material Type: Lecture

Author: kumud TANWAR