6-Methylisatoic anhydride synthesis
- Product Name:6-Methylisatoic anhydride
- CAS Number:20877-81-0
- Molecular formula:C9H7NO3
- Molecular Weight:177.16
Yield:20877-81-0 85%
Reaction Conditions:
in 1,4-dioxane; for 2 h;Reflux;
Steps:
5.1 Step 1: Preparation of 5-methyl-2H-benzo[d][1,3]oxazin-2,4(1H)-dione
Triphosgene (570 mg, 1.9 mmol) was added to a 2-amino-6-methylbenzoic acid (876 mg, 5.8 mmol) solution dissolved in 1,4-dioxane (10 mL) and the solution was refluxed for 2 hours. The solution was then cooled on ice. The solid was washed with hexane and dried in vacuo to give 880 mg (85%) of the pure compound as a brown solid.
References:
KR2020/24669,2020,A Location in patent:Paragraph 0583; 0585-0587
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