Process for the production of cyclopropylmethyl halides
US6077981A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1998 |
| Grant date | Jun 20, 2000 |
| Priority date | — |
| Expiry date | Aug 28, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for the production of cyclopropylmethyl halides (CPMX) such as cyclopropylmethyl chloride (CPMCl) and cyclopropylmethyl bromide (CPMBr) wherein cyclopropanemethanol (CPMO) is contacted with an aqueous solution of a hydrogen halide (HX) at a temperature in the range of -30.degree. C. to 35.degree. C. Also disclosed is a three-step process wherein CPMO is converted to a CPMX, the CPMX is separated as a liquid organic phase from the aqueous hydrogen halide by decantation and then is subjected to fractional distillation to provide CPMX in high purity. Finally, a process for the co-production of a CPMX and a cyclobutyl halide (CBX) is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.