5-Acetoacetlamino benzimdazolone synthesis
- Product Name:5-Acetoacetlamino benzimdazolone
- CAS Number:26576-46-5
- Molecular formula:C11H11N3O3
- Molecular Weight:233.22
Yield:26576-46-5 92%
Reaction Conditions:
in acetonitrile at 100; for 2 h;
Steps:
Chromophore MC-1[0150] The synthesis of the chromophore MC-1 will now be described. [0151] Reaction of 5-amino-benzimidazolone with diketene Synthesis scheme: 50 g (0.335 mol) 5-amino-benzimidazolone was suspended in 600 ml_ acetonitrile. 31 g (0.368 mol) of diketene was added and the reaction mixture was heated to 100°C. After 2 hours, the reaction mixture was allowed to cool down to room temperature. The precipitated intermediate was isolated by filtration and washed with acetonitrile. The crude intermediate was resuspended in acetonitrile and stirred for 12 hours at room temperature. The intermediate was isolated again by filtration, washed with acetonitrile and dried. The yield was 92%
References:
AGFA-GEVAERT WO2007/6636, 2007, A2 Location in patent:Page/Page column 40-41
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