Method for preparing tetrazole methanesulfonic acid salts, and novel compound used in same
US8680277B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Jan 14, 2011 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Jan 14, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D405/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
According to the present invention, a method for preparing tetrazole methanesulfonic acid salts comprises an acylation reaction using a novel 4-iodine-4H-chromene-2-carbothionic acid S-benzothiazole-2-yl ester. The method of the present invention 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.