Réaction #414673

Équation de réaction

1,2-Methylenedioxy-4-nitrobenzene

hydrazine hydrate

→

1,2-Methylenedioxy-4-nitrosobenzene

Solvants

tetrahydrofuran

water

water

Conditions de réaction

Traitement

1. 1
   workup.ADDITIONOn completion of the addition
2. 2
   Filtrationfiltered through a HYFLO (Trade Mark)
3. 3
   Filtrationfilter
4. 4
   workup.ADDITIONThe resulting solution was added dropwise to a chilled
5. 5
   workup.ADDITIONwas added
6. 6
   Filtrationthe green precipitate was filtered off
7. 7
   Lavagewashed with water
8. 8
   Autredried overnight under high vacuum

Mode opératoire

1,2-Methylenedioxy-4-nitrobenzene (8.3 g, 0.05 mol) was dissolved in tetrahydrofuran (150 ml) with rhodium on carbon catalyst (0.2 g) at 0° C. and was treated dropwise with hydrazine hydrate (2.8 g, 0.055 mol). On completion of the addition, the mixture was stirred for 1 hour and then filtered through a HYFLO (Trade Mark) filter. The resulting solution was added dropwise to a chilled, stirred solution of iron (III) chloride hexahydrate (27.5 g, 0.1 mol) in water (150 ml). On completion of the addition, water (220 ml) was added and the green precipitate was filtered off, washed with water and dried overnight under high vacuum. 1,2-Methylenedioxy-4-nitrosobenzene was obtained as a green solid (3.7 g, 50% yield) by column chromatography eluting on silica with dichloromethane. M.p. 90°-92° C. M+ (CI):152 (M+ +H)

Source