2-Benzothiazolecarboxylicacid,4-methoxy-,methylester(7CI,8CI,9CI) synthesis
- Product Name:2-Benzothiazolecarboxylicacid,4-methoxy-,methylester(7CI,8CI,9CI)
- CAS Number:7267-28-9
- Molecular formula:C10H9NO3S
- Molecular Weight:223.25
Yield:7267-28-9 230 mg
Reaction Conditions:
in methanol at 20; for 16 h;
Steps:
23.4 Step (4) 4-methoxybenzo[d]thiazole-2-carboxylic acid methyl ester
Compound 23-5 (2.7g crude product) was dissolved in methanol (20mL), the temperature was lowered to 0°C, acetyl chloride (2mL) was added dropwise,Slowly return to room temperature and react for 16h. The reaction solution is concentrated,The residue was diluted with ethyl acetate (50mL), washed with saturated brine (20mL×2), dried with anhydrous sodium sulfate,After concentration, it is separated by column chromatography (DCM/EA=20/1),Compound 23-6 was obtained as a yellow solid (230 mg).
References:
CN111434655,2020,A Location in patent:Paragraph 0709-0711; 0721-0723
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