p-Toluenesulfonic acid → HCID 59432423, compound

Participants

Reaction Conditions

Reaction Steps

Add isopropyl 7-methyl-5-oxo-8-trifluoromethyl-2,3,4,5-tetrahydrobenzo[b]azepine-1-carboxylate (Example 3, Step 8) (1.16 g, 3.52 mmol), 3-aminopyridine (465 mg, 5.10 mmol), p-toluenesulfonic acid (210 mg, 1.10 mmol) and toluene (8.0 mL) to a sealed tube and stir vigorously for 4 days at 130° C. Evaporate the toluene, dissolve the residue with MeOH (10.0 mL), and add sodium borohydride (146 mg, 3.86 mmol) portionwise. Reflux overnight and evaporate the MeOH. Partition the resulting residue between water (10 mL) and EtOAc (10 mL). Wash the organic layer with 2-mL portions of water and brine, dry (MgSO4), and concentrate. Purify via column chromatography (silica gel; 30% to 70% EtOAc:hexanes to 100% EtOAc gradient) to give 189 mg (13%) of the title compound as a white solid. APCI MS m/z 408 [M+H]+.

Provenance & Evidence