4,5,6,7-Tetrafluoro-1H-indole-3-carbaldehyde → HCID 178513724, compound

Participants

Reaction Steps

5-amino-3-((3-chlorophenyl)amino)-1H-pyrazole-4-carboxamide (100 mg) was then suspended in EtOH (4 mL) and 4,5,6,7-tetrafluoro-1H-indole-3-carbaldehyde (1 eq.) and piperidine (1 drop) were added. Stirred at reflux until intermediate was absent (HPLC). After reaction was complete (18 hrs) it was brought to room temperature and filtered to obtain product as a yellow powder. Powder was washed with EtOH. Product was allowed to dry under vacuum for 1 hr. Resulting imine was suspended in 5 mL MeOH and sodium borohydride (3 eq.) was added. HPLC confirmed reaction was complete (absence of imine). After completion (1 hr), precipitate was filtered to obtain D22 as a light yellow powder as product. Product was washed with deionized water to remove excess sodium borohydride.

Provenance & Evidence