Lithium borohydride → HCID 11667216, compound

Participants

Reaction Steps

To a solution of 0.800 g (4R,9aR)-7-fluoro-8-formyl-4-methyl-3,4,9,9a-tetrahydro-1H-2,4a,5-triaza-fluorene-2-carboxylic acid tert-butyl ester (intermediate i, examples 54–61) in 15 mL tetrahydrofurane was added 0.052 g lithium borohydride and the mixture was stirred at room temperature for 0.5 h. The reaction mixture was partitioned between water and ethyl acetate. The organic phase was washed twice with water dried over sodium sulfate and evaporated. The residue was purified by chromatography on silica gel with methylenechloride:ethyl acetate (3:2) to yield 0.56 g (4R,9aR)-7-fluoro-8-hydroxymethyl-4-methyl-3,4,9,9a-tetrahydro-1H-2,4a,5-triaza-fluorene-2-carboxylic acid tert-butyl ester as colorless foam.

Provenance & Evidence