Tetrahydrofuran → 1-Methyl-4-phenyl-3,4-dihydrocarbostyril

Participants

Reaction Conditions

Reaction Steps

To a suspension of NaH (1.2 eq., 0.537 g of 60% dispersion in mineral oil) in THF (50 mL) under N2 at 0° C. was added the product from Step A (1.0 eq., 2.50 g) in THF (50 mL) via cannula over a period of 5 minutes. The resulting pale yellow mixture was stirred at 0° C. for 10 minutes, then Mel (2.0 eq., 1.39 mL) was added. The opaque yellow mixture was allowed to slowly (ice bath not removed) warm to ambient temperature with stirring for 15 hours. 1M Aq. HCl (50 mL) and EtOAc (250 mL) were added and the phases partitioned. The organic phase was washed with dilute NaHCO3 (1×100 mL), brine (1×100 mL), then dried over MgSO4, filtered, concentrated, and the residue purified by flash chromatography eluting with CH2Cl2/EtOAc (19:1 gradient to 15:1) to provide 1-methyl-4-phenyl-3,4-dihydrocarbostyril.

Provenance & Evidence