Sodium borohydride → HCID 21408240, compound

Participants

Reaction Steps

11.0 g of 8-[(7-fluoro-1,2,3,4-tetrahydro-1-oxo-2-naphthalenyl)-methyl]-1-phenyl-1,3,8-traizaspiro[4.5]decan-4-one (see example 187) is taken up in methanol (240 ml), cooled in an ice-bath and treated over a 20 minute period with 6.6 equivalents of sodium borohydride in water (58 ml). The mixture is then allowed to warm up to room temperature and stirred for 48 hours. The reaction mixture is diluted with ice-water (400 ml), stirred for 30 minutes and the precipitates that form are filtered off and dried in vacuo at 80° C to give the title compound (6.9 g), melting point 210°-212° C. The filtrate is extracted with 500 ml of methylene chloride to give another 4.3 g of crude product.

Provenance & Evidence