Lithium borohydride → HCID 58551033, compound

Participants

Reaction Steps

2-Isopropoxy-5-(1-methylspiro[chromeno[4,3-c]pyrazole-4,4′-piperidine]-1′-carbonyl)benzaldehyde (110 mg, 0.25 mmol) was dissolved in THF (3 mL) and LiBH4 (11 mg, 0.50 mmol) was added. The reaction was stirred at room temperature for 1.5 h before being quenched with methanol (3 mL). The reaction was neutralized by the addition of a saturated sodium bicarbonate solution and was extracted with ethyl acetate (3×). The combined organic layers were dried over Na2SO4, filtered and the solvent was evaporated under reduced pressure. The crude product was purified by column chromatography on silica gel (0-100% ethyl acetate in hexane) to yield [3-(hydroxymethyl)-4-isopropoxy-phenyl]-(1-methylspiro[chromeno[4,3-c]pyrazole-4,4′-piperidine]-1′-yl)methanone (74 mg, 65%) as a white solid. ESI-MS m/z calc. 447.5. found 448.3 (M+1)+. Retention time: 1.59 minutes (3 min run).

Provenance & Evidence