Formaldehyde → HCID 22660570, compound

Participants

Reaction Steps

The product of Example 64, (5-Chloro-1H-indol-2-yl)-(3-methyl-piperazin-1-yl)-methanone (0.19 g) was dissolved in dichloromethane (10 mL). At room temperature, paraformaldehyde (0.031 g) was added, followed by acetic acid (1 drop). The reaction mixture was stirred at ambient temperature for 5 h. Sodium triacetoxybrohydride (0.318 g) was added. The reaction mixture was stirred at ambient temperature for 16 h and poured into dichloromethane (20 mL), washed with water, saturated sodium hydrogencarbonate solution and then brine, dried over sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified via silica gel chromatography (0-10% methanol/dichloromethane) to give the title compound (0.22 g). 1H NMR (400 MHz, CDCl3): δ 10.69 (br s, 1H), 7.56 (d, J=1.76 Hz, 1H), 7.33 (d, J=8.80 Hz, 1H), 7.16 (dd, J=1.96, 6.66 (d, J=1.57 Hz, 1H), 4.63-4.36 (m, 2H), 3.63-2.67 (m, 3H), 2.30 (s, 3H), 2.30-2.20 (m, 1H), 2.18-2.09 (m, 1H), 1.12 (d, J=5.87 Hz, 1H). MS (electrospray): exact mass calculated for C15H18ClN3O, 291.11; m/z found, 292.1 [M+H]+.

Provenance & Evidence