Sodium Hydroxide → HCID 178516200, compound

Participants

Reaction Steps

In dimethylsulfoxide (3 mL) was dissolved 32.6 mg (0.111 mmol) of 3-(1,1a,6,6a-tetrahydrocyclopropa[a]inden-5-yloxy)-4,6-dichloropyridazine obtained in Example 14 (8), and 0.1 mL (0.2 mmol) of 2 mol/L aqueous sodium hydroxide solution was added to the solution and the resulting mixture was stirred at room temperature for 4 hours. The reaction mixture was poured into ice-cold 1 mol/L aqueous sodium hydroxide solution, and washed with ethyl acetate. The aqueous layer was separated, conc. hydrochloric acid was added thereto to adjust pH to 4 in an ice bath, and extracted with ethyl acetate. The organic layers were combined, washed successively with water and brine, dried over sodium sulfate. The solvent was distilled off and the obtained residue was purified by preparative thin-layer chromatography (available from Merck Co., 1.05744, 1 plate was used, developed by chloroform:methanol=10:1) to obtain 13.4 mg (0.0487 mmol, Yield: 43.9%) of 3-(1,1a,6,6a-tetrahydrocyclopropa[a]inden-5-yloxy)-6-chloro-4-pyridazinol (Compound No. 516).

Provenance & Evidence