Formaldehyde → HCID 86727503, compound

Participants

Reaction Steps

To a solution of (R)-7-isopropyl-4-methyl-6-[(R)-1-(3-methyl-azetidin-3-yl)-ethyl]-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one hydrochloric acid (Example #133, Step G, 0.0227 g, 0.064 mmol) in MeOH (2 mL) and acetic acid (0.2 mL) was added paraformaldehyde (0.765 mL, 0.255 mmol) and the reaction mixture was stirred at ambient temperature for 0.5 h. NaBH3CN (0.008 g, 0.127 mmol) was added and the reaction mixture was stirred at ambient temperature for 0.5 h. The reaction mixture was concentrated in vacuo and the residue was purified by prep-TLC (eluting with 10% MeOH in dichloromethane) to give (R)-6-[(R)-1-(1,3-dimethyl-azetidin-3-yl)-ethyl]-7-isopropyl-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one (0.0199 g, 84%) as a solid. 1H NMR (CD3OD-d4, 400 MHz): δ 7.00 (s, 1H), 6.79 (s, 1H), 4.83 (br. s., 1H), 4.60 (s, 2H), 3.96 (m, 1H), 3.91 (m, 1H), 3.76 (d, J=9.8 Hz, 1H), 3.67 (d, J=9.8 Hz, 1H), 3.38 (m, 1H), 3.18 (m, 1H), 2.71 (s, 3H), 1.48-1.43 (m, 6H), 1.38 (d, J=6.8 Hz, 3H), 1.30 (d, J=6.8 Hz, 3H), 1.15 (d, J=6.8 Hz, 3H). LC/MS (Table 1, Method 4) Rt=1.601 min.; MS m/z: 371 [M+H]+. SFC (Table 1, Method 24) Rt=7.354 min.

Provenance & Evidence