Trifluoroacetic acid → HCID 60123707, compound

Participants

Reaction Steps

The product (8.01 g) containing 1-cyclopropyl-2-propen-1-one described in Reference Example 1 and N-(n-butoxymethyl)-N-[1-(R)-phenylethyl]trimethylsilylmethylamine (23.2 g, 79.9 mmol) were dissolved in dry dichloroethane (350 ml), and trifluoroacetic acid (500 μl) was added dropwise thereto. After 12 hours of stirring at room temperature, the reaction solution was washed with saturated sodium bicarbonate aqueous solution (100 ml) and then with saturated brine (100 ml). After drying over anhydrous magnesium sulfate and subsequent filtration, the filtrate was concentrated under a reduced pressure. The thus obtained residue was subjected to a flash silica gel chromatography, and 9.08 g (49.6%) of the title compound was obtained from an eluate of n-hexane:ethyl acetate=2:1 as a colorless oil component. In this case, this product was obtained as a diastereomer mixture of 1:1.

Provenance & Evidence