Tetrahydrofuran → 1-[2-(1,3,5-Triethylphenyl)-2-oxoacetyl]-1-methyl-2-(1-methylsulfonyl-2-propylidene)hydrazine

Participants

Reaction Conditions

Reaction Steps

To a 3 L volume four-necked flask, 1-methyl-2-(1-methylsulfonyl-2-propylidene)hydrazine (5-2-1) (116.0 g), tetrahydrofuran (anhydrous) (600 ml), and triethylamine (98.5 ml) were added under a nitrogen atmosphere, and cooled to about 1° C. To the mixture, 2-(1,3,5-triethylphenyl)-2-oxoacetyl chloride (6-b) (178.5 g) was added dropwise, and stirred at 0° C. for 1 hour. The reaction mixture was added dropwise to hexane (3 L) at room temperature, and stirred for 1 hour. The precipitated solids were collected by filtration, washed with hexane (0.5 L×2) and water (0.5 L×6), and dried under reduced pressure to give 200.9 g of 1-[2-(1,3,5-triethylphenyl)-2-oxoacetyl]-1-methyl-2-(1-methylsulfonyl-2-propylidene)hydrazine ((4-34)-(1)-40).

Provenance & Evidence