Methyl 2-(3-oxo-3,4-dihydro-2H-1,4-benzoxazin-6-yl)acetate synthesis
- Product Name:Methyl 2-(3-oxo-3,4-dihydro-2H-1,4-benzoxazin-6-yl)acetate
- CAS Number:866038-49-5
- Molecular formula:C11H11NO4
- Molecular Weight:221.21
78587-72-1
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79-04-9
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$12.00/5g
866038-49-5
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$365.00/500mg
Yield:866038-49-5 90%
Reaction Conditions:
with Sodium hydrogenocarbonate in lithium hydroxide monohydrate;ethyl acetate at 25; for 1 h;
Steps:
1.1 Stage 1: Methyl 2-(3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)acetate
Chloroacetyl chloride (1 equiv.) was added at room temperature to a mixture of methyl (3-amino-4-hydroxyphenyl)acetate (5.5 mmol) and sodium hydrogen carbonate (1.1 equiv.) in ethyl acetate (5 ml)/water (5 ml). The reaction mixture was stirred for 1 h, then the phases were separated and the organic phase was washed with water and saturated sodium chloride solution, dried over sodium sulfate and concentrated in vacuo. The crude product was dissolved in DMF (11 ml); activated potassium carbonate was added, and the mixture was stirred overnight at room temperature. The reaction mixture was then diluted with water and extracted with ethyl acetate. The organic phase was again washed with water and saturated sodium chloride solution, dried over sodium sulfate and concentrated in vacuo. The crude product was purified by column chromatography (silica gel, ethyl acetate/hexane). Yield: 90%
References:
US2010/234340,2010,A1 Location in patent:Page/Page column 23
61873-93-6
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866038-49-5
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$365.00/500mg
23786-14-3
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866038-49-5
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34837-88-2
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866038-49-5
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$365.00/500mg
104-01-8
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$6.00/10g
866038-49-5
21 suppliers
$365.00/500mg