Crystal of spiroketal derivatives and process for preparation of spiroketal derivatives
US8569520B2 · kind B2 · utility
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2References
21Claims
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Key dates
| Filing date | Jun 19, 2009 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Aug 11, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07H23/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a process for preparing a spiroketal derivative, via an intermediate represented by Formula (VI):wherein variable groups and numbers are as defined in the specification, which can be produced from dihalobenzene derivatives in one pot reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.