HCID 136197345, compound → HCID 136197376, compound

Participants

Reaction Steps

The compound (4.0 g, 10 mmol) of Example 33 was suspended in concentrated hydrochloric acid and heated to be refluxed. Reduced iron powder (1.7 g, 30 mmol) was added into the reaction mixture in batch, and stirred for 1 h. The hot reaction mixture was filtered and cooled to room temperature to generate a yellowish precipitate. After filtered, the solid was dried at 60° C. to give the hydrochlorate of the title compound (3.0 g, yield: 82%). 1H NMR (DMSO-d6) δ: 12.55 (1H, br), 10.18 (2H, br), 7.72 (1H, d), 7.50 (1H, dd), 7.27 (1H, d), 4.04 (2H, t), 3.39 (1H, m), 1.73 (2H, m), 1.17 (6H, d), 0.95 (3H, t).

Provenance & Evidence