C([N:3]([CH2:15][CH3:16])[C:4](=[O:14])[C:5]1[CH:10]=[CH:9][C:8]([O:11][CH3:12])=[CH:7][C:6]=1[CH3:13])C.C([Li])(C)(C)C.CCCCC.[F:27][C:28]1[CH:35]=[CH:34]C(C#N)=[CH:30][CH:29]=1>C1COCC1>[F:27][C:28]1[CH:35]=[CH:34][C:16]([C:15]2[N:3]=[C:4]([OH:14])[C:5]3[C:6]([CH:13]=2)=[CH:7][C:8]([O:11][CH3:12])=[CH:9][CH:10]=3)=[CH:30][CH:29]=1
To a solution of N,N-diethyl-4-methoxy-2-methylbenzamide (500 mg, 2.259 mmol) in THF (4.52 ml) at −78° C. was added dropwise tert-butyllithium 1.7 M in pentane (1.59 ml, 2.71 mmol) and the solution was stirred for 0.5 h before addition of 4-fluorobenzonitrile (274 mg, 2.259 mmol) in THF (4.52 ml). The resulting solution was warmed to RT and stirred for 16 h. The reaction mixture was quenched with water, neutralized with 1 N HCl. The precipitated solid was collected and washed with water to give 3-(4-fluorophenyl)-6-methoxyisoquinolin-1-ol (350 mg, 58% yield) as a solid after drying.
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