反应详情

3-(2-(tert-Butyldimethylsilyloxy)ethyl)-2-fluorobenzaldehyde (example 78, step b) (2.159 g) was added to stirred solution of 2,2,2-trifluoro-1-(1-oxa-4,9-diazaspiro[5.5]undecan-4-yl)ethanone trifluoroacetate (example 12, step d) (2.80 g) and acetic acid (0.438 mL) in NMP (25 mL). After 5 minutes, sodium triacetoxyborohydride (3.24 g) was added. After 16 h, water was added and the mixture partitioned between water (250 mL) and ethyl acetate (250 mL). The ethyl acetate solution was washed with water (3×250 mL) and brine, then evaporated to dryness. Purification by silica gel chromatography eluting with 20:1:1, isohexane:ethyl acetate:triethylamine gave the subtitled compound as a gum. Yield 2.5 g.

1. waitAfter 16 h
2. customthe mixture partitioned between water (250 mL) and ethyl acetate (250 mL)
3. washThe ethyl acetate solution was washed with water (3×250 mL) and brine
4. customevaporated to dryness
5. customPurification by silica gel chromatography
6. washeluting with 20:1:1, isohexane