Process for producing 6,6'-dihydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindane
US4701567A · kind A · utility
3Cited by
2References
7Claims
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Key dates
| Filing date | Jun 26, 1986 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Jun 26, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/94
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A novel process for producing 6,6'-dihydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindane of the formula (1) ##STR1## which comprises heat-treating 2,2-bis(4-hydroxyphenyl)propane in the presence of a superacid-type resin or a perfluoroalkanesulfonic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.