Hydrochloric Acid → HCID 71657645, compound

Participants

Reaction Steps

Ethyl 7-(2,3-bis(2,4-difluorophenyl)-7,8-dihydropyrido[2,3-b]pyrazin-5(6H)-yl)heptanoate (step 1) (480 mg, 0.931 mmol) in THF (2.5 ml) was treated with LiOH (178 mg, 7.45 mmol) followed by water (2.5 ml) and stirred vigorously for 3 days. The mixture was acidified to pH4/5 using 5M HCl and extracted with DCM. The combined organic extracts were dried (sodium sulphate), filtered and concentrated under reduced pressure. Purification was carried out on silica eluting with 20-25% TBME in DCM. The resulting product was further purified under the following conditions to afford the titled compound;

Provenance & Evidence