1,2-Benzisoxazole-3-methanesulfonic acid sodium salt synthesis
- Product Name:1,2-Benzisoxazole-3-methanesulfonic acid sodium salt
- CAS Number:73101-64-1
- Molecular formula:C8H8NNaO4S
- Molecular Weight:237.2
597563-86-5
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73101-64-1
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Yield:73101-64-1 93.26%
Reaction Conditions:
with sodium hydroxide in monoethyleneglycol at 25 - 90; for 3 h;Product distribution / selectivity;Heating;
Steps:
2.iv
STEP-iv: PREPARATION OF SODIUM 1, 2-BENZIOXAZOLE-3-METHANE SULFONATE. To a stirred solution of 4-Oximino-3,4-Dihydro-1, 2-Benzoxathiin-4-one-2,2- dioxide) prepared by the process described in step-3 above (55gms. 2582 M) in 550 ml of MONOETHYLENE GLYCOL and sodium hydroxide (10. 3G, 0.2582) and at room temperature and heated to 85-90° and maintained for 3 hours. After the reaction completion evaporate the monoethyleneglycol completely under vacuum to obtain a residue (7G) of the compound of the formula (2). The residue purified in methanol following the method described in the example-1 (step4) to get the pure product 1. 35G with a purity of 93. 26%
References:
WO2005/30738,2005,A1 Location in patent:Page/Page column 16-17
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