Process for preparing A 2-substituted benzofuran-3-yl borate ester
US8580976B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Nov 26, 2012 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Nov 26, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for preparing a stable 2-substituted benzofuran-3-yl borate ester corresponding to the formula:said process comprising contacting 3-bromo-2-substituted-benzofuran corresponding to the formula:with an C1-4 alkyllithium at a temperature less than −60° C. to form 3-lithio-2-substititued-benzofuran, contacting the 3-lithio-2-substituted- benzofuran at a temperature less than −60° C. with an borate ester corresponding to the formula:and recovering the resulting borate ester product,
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.