Reaction Steps
A mixture of 6 (50 mg, 0.061 mmol) and 10% Pd—C (20 mg) in MeOH (8 mL) and EtOAc (3 mL) was stirred under 1 atm H2 atmosphere until 6 was no longer detected by TLC. The resulting solution was filtered and concentrated in vacuo to give 7 as a yellow amorphous solid (39 mg, 88%). 1H NMR (400 MHz, CDCl3) δ 8.16 (d, J=8.4 Hz, 2H), 8.06 (s, 1H), 7.77-7.65 (m, 7H), 7.59 (d, J=8.0 Hz, 2H), 7.29 (t, J=8.0 Hz, 2H), 7.11 (s, 1H), 7.03 (d, J=7.6 Hz, 1H), 6.93 (d, J=8.0 Hz, 1H), 6.66 (s, 1H), 4.34 (brt, 2H), 4.15 (q, J=7.2 Hz, 2H), 3.72 (s, 2H), 3.52 (brt, 2H), 1.72-1.65 (m, 2H), 1.51-1.47 (m, 2H), and 1.24 (t, J=7.2 Hz, 3H); 13C NMR (100 MHz, CDCl3) δ 188.63, 171.67, 170.53, 168.73, 157.13, 149.52, 143.65, 141.52, 137.98, 137.73, 137.34, 134.34, 134.25, 131.97, 131.89, 131.84, 130.82, 130.56, 130.40, 129.55, 129.37, 123.54, 121.93, 121.17, 120.89, 116.52, 116.44, 112.83, 104.34, 61.59, 43.97, 37.38, 34.90, 27.46, 25.84, and 14.40.
