2-Chloro-1,1-diethoxyethane → HCID 57977403, compound

Participants

Reaction Conditions

Reaction Steps

0.95 g (2.5 mmol) of 5-chloro-7-(1,2-dimethylpropylamino)-6-(3-methylthiophen-2-yl)pyrazolo-[1,5-α]pyrimidine-3-carboxamide was dissolved in 25 ml of ethanol, and 1.0 g (6.5 mmol) of chloroacetaldehyde diethyl acetal was added. The mixture was stirred for 3 hours at 120° C. and 15 bar in a microwave oven (200 W). The reaction mixture was then concentrated under reduced pressure, and the residue that remained was chromatographed on silica gel using a mixture of cyclohexane:ethyl acetate=1:1. This gave 0.3 g of [5-chloro-6-(3-methylthiophen-2-yl)-3-oxazol-2-yl-pyrazolo[1,5-α]pyrimidin-7-yl](1,2-dimethylpropyl)amine (logPs=4.3; content according to HPLC: 98%)

Provenance & Evidence