4.2.3. 2-[Carboxy(4-methoxyphenyl)methyl]benzoic Acid (**10c**)

Prepared according to the general procedure GP1 from 3-(4-methoxyphenyl)-2,3 dihydro-1H-inden-1-one [21]. Yield 703 mg, 62%. Colorless amorphous solid. 1H NMR (400 MHz, DMSO-d6) δ 12.75 (s, 2H), 7.86 (dd, J = 7.7, 1.6 Hz, 1H), 7.46 (td, J = 7.5, 1.6 Hz, 1H), 7.33 (t, J = 7.5 Hz, 1H), 7.15 (d, J = 8.7 Hz, 2H), 7.08 (d, J = 7.7 Hz, 1H), 6.92 (d, J = 8.7 Hz, 2H), 5.88 (s, 1H), 3.74 (s, 3H). 13C NMR (101 MHz, DMSO-d6) δ 173.7, 168.7, 158.2, 140.6, 131.5, 130.9, 130.6, 130.2, 130.1, 129.7, 126.7, 113.9, 55.1, 52.3. HRMS (ESI/Q-TOF) *m*/*z*: [M-H]− Calcd for C16H13O5 − 285.0769; Found 285.0768.
