Methanol → HCID 12709721, compound

Participants

Reaction Steps

(rac)-8-Benzyl-4-phenyl-2,8-diaza-spiro[4.5]decane-1,3-dion (10.0 g, 30 mmol synthesis described in example 156) was dissolved in toluene (200 mL). Diisobutyl aluminium hydride (220 mL, 1M in THF, 220 mmol) was slowly added while cooling with an ice bath so that the reaction temperature did not exceed 10° C. The reaction mixture was stirred at room temperature for 2 days. A mixture of methanol (6 mL) and water (6 mL) was added at room temperature. The resulting gel was filtered through dicalit and washed with methylene chloride. The filtrate was evaporated to give 8-benzyl-3-hydroxy-4-phenyl-2,8-diaza-spiro[4.5]decan-1-one as a mixture of diastereomers (8.0 g, 80%).

Provenance & Evidence