Imidazole → 4,5-(Dimethylmethylenedioxy)-3-(tert-butyldimethylsilyloxy)6-heptenenitrile

Participants

Reaction Steps

Two grams of tert-butyldimethylsilyl chloride were gradually added at 0° C. to a solution comprising 2.11 g of 4,5-(dimethylmethylenedioxy)-3-hydroxy-6-heptenenitrile, 2.0 g of imidazole and 50 ml of methylene chloride. After stirring was conducted at room temperature for 16 hours, the reaction mixture was diluted with 300 ml of diethyl ether, and washed with 1N hydrochloric acid, a saturated sodium hydrogen carbonate aqueous solution and a sodium chloride aqueous solution in sequence. The organic layer was dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography to afford 2.63 g of 4,5-(dimethylmethylenedioxy)-3-(tert-butyldimethylsilyloxy)6-heptenenitrile having the following properties (yield 79%).

Provenance & Evidence