Hydrochloric Acid → aziridin-1-yl(6,6-diphenyl-1-(2-trimethylsilanylethoxymethyl)-6,7-dihydro-1H-indazol-3-yl)methanone

Participants

Reaction Conditions

Reaction Steps

A solution of 0.2 g of 6,6-diphenyl-1 (2-trimethylsilanylethoxymethyl)-6,7-dihydro-1H-indazole-3-carboxylic acid (2-chloroethyl)amide in 7 cm3 of dimethylformamide is added dropwise to a suspension of 0.023 g of sodium hydride (at 60% in oil) in 3 cm3 of dimethylformamide cooled to a temperature in the region of 5° C. The reaction mixture is stirred for two hours at a temperature in the region of 20° C. The solution obtained is poured into a mixture of 30 cm3 of water and 0.3 cm3 of aqueous 1N hydrochloric acid solution while maintaining the temperature in the region of 5° C., and the mixture is extracted with three times 30 cm3 of ethyl acetate. The combined organic phases are washed with three times 30 cm3 of water and 30 cm3 of saturated aqueous sodium chloride solution, dried over magnesium sulphate, filtered and concentrated to dryness under reduced pressure (13 kPa). After flash chromatography on a column of silica [eluent: cyclohexane/ethyl acetate (70/30 by volume)], 0.078 g of aziridin-1-yl(6,6-diphenyl-1-(2-trimethylsilanylethoxymethyl)-6,7-dihydro-1H-indazol-3-yl)methanone is thus obtained in the form of a resin, the characteristics of which are as follows:

Provenance & Evidence