Method for preparing tetrazole methanesulfonic acid salts, and novel compound used in same
US8940908B2 · kind B2 · utility
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Key dates
| Filing date | Feb 3, 2014 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Feb 3, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D405/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for preparing tetrazole methanesulfonic acid salts includes an acylation reaction using a novel 4-iodine-4H-chromene-2-carbothionic acid S-benzothiazole-2-yl ester. The method is advantageous that it can shorten a reaction time and improve safety as compared to conventional methods, and can prepare high-purity tetrazole methanesulfonic acid salts at a high yield rate without using a column chromatography method.
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