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Sodium bis(trimethylsilyl)amide (2 mL, 4 mmol, 2M in THF) was added to a stirred suspension of (methoxymethyl)triphenylphosphonium chloride (1.47 g, 4.3 mmol) in dry THF (20 mL) at 0° C. for 35 min and a solution of 5-Oxo-5,6,7,8-tetrahydronaphthalene-1-carbonitrile [prepared from 5-bromo-tetralone following the procedure described in PCT publication WO2004/071389A2, Intermediate 41](490 mg, 2.86 mmol) in THF (10 mL) added over 10 min. The mixture was stirred at 0° C. for 2 h and at room temperature for 1 h. Water was added and the mixture was partitioned between EtOAc and brine. The organic layer was dried and concentrated. The crude product was purified via preparative-TLC (PE:EtOAc=10:1) to afford the title compound.

1. additionadded over 10 min
2. customthe mixture was partitioned between EtOAc and brine
3. customThe organic layer was dried
4. concentrationconcentrated
5. customThe crude product was purified via preparative-TLC (PE:EtOAc=10:1)