Hydrazine → HCID 178456808, compound

Participants

Reaction Steps

To a solution of 3-(2-fluorophenyl)-2-(2-(isopropylamino)thiazolo[5,4-b]pyridin-5-yl)-3-oxopropanenitrile (0.10 g, 0.282 mmol, 1.0 eq.) in EtOH (1 mL) and HOAc (2 mL) at 0° C. was added hydrazine (0.1 mL, 3.19 mmol, 11.3 eq.). After 10 min., the cold bath was removed, and the reaction mixture was stirred to room temperature for 10 min. It was then heated at 88° C. for 5 hr and at 100° C. overnight. After cooling to room temperature and then to 0° C., water was added followed by concentrated aqueous NH4OH until pH was 10 by litmus paper. The aqueous layer was extracted with EtOAc (3×). The organic layers were combined, dried over Na2SO4, filtered, and concentrated in vacuo. MeOH was added to the residue, and the mixture was subjected to autoprep. The appropriate fractions were collected, and NaHCO3 (s) was added. The solution was then concentrated in vacuo not to dryness and extracted with CH2Cl2 (3×). The organic layers were combined, dried over Na2SO4, filtered, and concentrated in vacuo to give 5-(5-amino-3-phenyl-1H-pyrazol-4-yl) -N-isopropylthiazolo[5,4-b]pyridin-2-amine as a light yellow solid (0.0014 g, 1.3% yield). LC/MS (MH)=369.14.

Provenance & Evidence