Process for the preparation of (2,2)-paracyclophane and derivatives thereof
US4795838A · kind A · utility
29Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1987 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Jun 26, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/92
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p-methylbenzyltrimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is carried out in the presence of a dialkylether of mono- and poly-ethylene glycols having the formula: EQU R--O--CH.sub.2 CH.sub.2 O--.sub.n R' (I) wherein R and R', which may be the same or different, represent alkyl groups having from 1 to 5 carbon atoms, and n is an integer from 1 to 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.