Réaction #49687

Équation de réaction

2-benzylidenehydrazono-3-ethoxycarbonylmethyl-1-methoxycarbonylmethylimidazolidin-4-one

→

7-ethoxycarbonylmethyl-1,4,5,7-tetraazabicyclo[4,3,0]-nonan-5-ene-3,8-dione

Rendement 39.1%

Solvants

hydrochloric acid

Conditions de réaction

Traitement

1. 1
   workup.DISTILLATIONthe mixture was subjected to a steam distillation for 40 minutes
2. 2
   AutreThe reaction mixture obtained
3. 3
   Concentrationwas concentrated under reduced pressure
4. 4
   Autrethe residue formed
5. 5
   workup.ADDITIONwas charged on silica gel column chromatography
6. 6
   Lavageeluted with a mixture of chloroform and ethyl acetate at 1:2 by volume

Mode opératoire

To 230 mg of 2-benzylidenehydrazono-3-ethoxycarbonylmethyl-1-methoxycarbonylmethylimidazolidin-4-one obtained in step (1) of Example 7 was added 10 ml of 0.5N hydrochloric acid, the mixture was subjected to a steam distillation for 40 minutes. The reaction mixture obtained was concentrated under reduced pressure, and the residue formed was charged on silica gel column chromatography and eluted with a mixture of chloroform and ethyl acetate at 1:2 by volume to obtain 60 mg of 7-ethoxycarbonylmethyl-1,4,5,7-tetraazabicyclo[4,3,0]-nonan-5-ene-3,8-dione.

Source