Heptanenitrile, 7-bromo- → 7-{2-[4-Biphenyl-3-yl-3-(tert-butyl-dimethyl-silanyloxy)-butyl]-5-oxo-pyrrolidin-1-yl}-heptanenitrile

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Reaction Steps

Following the procedure described for Example 5, Step A, the anion derived from 5-[4-biphenyl-3-yl-3-(tert-butyl-dimethyl-silanyloxy)-butyl]-pyrrolidin-2-one (239.1 mg, 0.564 mmol) and NaHMDS (1M in THF, 0.67 mL, 0.67 mmol) was alkylated with 7-bromoheptanenitrile (118 mg, 0.620 mmol) at 70° C. for 24 h. Purification by medium pressure chromatography (CH2Cl2 to 1% MeOH in CH2Cl2 to 2% MeOH in CH2Cl2 to 4% MeOH in CH2Cl2) provided 7-{2-[4-biphenyl-3-yl-3-(tert-butyl-dimethyl-silanyloxy)-butyl]-5-oxo-pyrrolidin-1-yl}-heptanenitrile (187 mg). MS 533.3 (M+1).

Provenance & Evidence