反应详情

To a 50 ml volume three-necked flask, 1-methyl-2-(1-methylsulfonyl-2-propylidene)hydrazine (5-2-1) (2.22 g) and tetrahydrofuran (anhydrous) (10 ml) were added under a nitrogen atmosphere. To the mixture, 2-(1-methyl-1H-indol-3-yl)-2-oxoacetyl chloride (26-a) (3.0 g) was added dropwise under ice-cooling, and stirred for 2 hours. The reaction mixture was added to iced water, and the precipitated solids were collected by filtration, washed with water and hexane, and dried under reduced pressure to give 3.4 g of 1-methyl-1-[2(1-methyl-1H-indol-3-yl)-2-oxoacetyl]-2-(1-methylsulfonyl-2-propylidene)hydrazine ((4-203-(13)28).

1. temperaturecooling
2. filtrationthe precipitated solids were collected by filtration
3. washwashed with water and hexane
4. customdried under reduced pressure