Propylenediamine → Diisopropyl(3-methyl-2,5-diaza-7,9-dithiabicyclo-[4,3,0]-nonane-8-ylidene)malonate

Participants

Reaction Steps

To a suspension of 17.4 g of glyoxal sodium bisulfite in 120 ml of water was added dropwise 7.1 g of propylenediamine at 0° C. and the mixture was stirred for 1 hour. Then to this solution was added dropwise at 0° C. the dithiolate solution, which had been prepared previously as follow; To a mixture of 15.04 g of diisopropyl malonate and 6.4 g of carbon disulfide was added dropwise with ice-cooling 23.8 g of 45% aqueous potassium hydroxide solution and was stirred at the same temperature for 1 hour.

Provenance & Evidence