Water → aziridin-1-yl(6,6-diphenyl-6,7-dihydro-1H-indazol-3-yl)methanone

Participants

Reaction Conditions

Reaction Steps

6 cm3 of a commercial 1 M solution of tetrabutylammonium fluoride in tetrahydrofuran are added to a solution of 0.235 g of aziridin-1-yl(6,6-diphenyl-1-(2-trimethylsilanylethoxymethyl)-6,7-dihydro-1H-indazol-3-yl)methanone in 2.5 cm3 of tetrahydrofuran cooled to a temperature in the region of 0° C. After stirring for about 48 hours at a temperature in the region of 20° C., the mixture is poured into 30 cm3 of an ice plus water mixture and extracted with three times 50 cm3 of diethyl ether. The combined organic phases are washed with three times 25 cm3 of water and 25 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: dichloromethane/methanol (90/10 by volume)], 0.80 g of aziridin-1-yl(6,6-diphenyl-6,7-dihydro-1H-indazol-3-yl)methanone is thus obtained in the form of a solid, the characteristics of which are as follows:

Provenance & Evidence