Isobutyronitrile → 3-{1-[Bis(4-chlorophenyl)methyl]azetidin-3-yl}-3-(3,5-difluorophenyl)-3-hydroxy-2,2-dimethylpropanenitrile

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Reaction Steps

To a solution of 84 uL (0.928 mmol) of isobutyronitrile in 2 mL of THF was added a solution of 370 uL (0.928 mmol) of butyllithium (2.5M solution in hexanes), followed by stirring for 50 minutes at −55° C. to 40° C. Then a solution of 334 mg (0.773 mmol) of {1-[bis(4-chlorophenyl)methyl]azetidin-3-yl}(3,5-difluorophenyl)methanone (as in Preparation 6) in THF was added at −78° C. and the solution was stirred for 5 h at −60° C. to −50° C. A solution of 2 mL of saturated NH4Cl was added to quench the reaction and the reaction mixture was poured into 30 mL of ether and washed with 5 mL of aq NaHCO3. The organic layer was dried over Na2SO4 and concentrated. The residue was purified by silica gel chromatography with hexanes/ethyl acetate=4:1 to afford the title compound. 1NMR (CDCl3) δ 1.24 (s, 3H), 1.34 (S, 3H), 2.58 (br, 1H), 3.12 (br, 1H), 3.40 (br, 2H), 3.60 (br, 1H), 4.26 (m, 1H), 4.43 (s, 1H), 6.76 (m, 1H), 7.06 (m, 2H), 7.25-7.34 (m, 8H); Mass Spectrum: m/e=501 (M+1 35Cl, 35Cl) and 503 (M+1 35Cl, 37Cl).

Provenance & Evidence