Proton sponge → tert-butyl[4-(methoxymethyl)tetrahydro-2H-pyran-4-yl]carbamate

Participants

Reaction Steps

To a solution of tert-butyl[4-(hydroxymethyl)tetrahydro-2H-pyran-4-yl]carbamate (0.89 g, 3.8 mmol) in methylene chloride (19.2 mL) was added sequentially powdered MS 4A, N,N,N′,N′-tetramethyl-1,8-naphthalenediamine (2.0 g, 9.6 mmol), and trimethyloxonium tetrafluoroborate (1.1 g, 7.7 mmol) at RT. The mixture was stirred for 5 h., filtered through a pad of Celite, and washed with EtOAc. The filtrate was washed with aqueous CuSO4, water, brine, dried over MgSO4, filtered, and concentrated. The residue was purified by chromatography on silica gel with EtOAc in hexanes (0-30%) to afford the desired product. LCMS: (M+Na)=268.0

Provenance & Evidence