Process for the synthesis of alpha-chlorinated chloroformates
US4592874A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1981 |
| Grant date | Jun 3, 1986 |
| Priority date | — |
| Expiry date | May 6, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C68/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the synthesis of .alpha.-chlorinated chloroformates, and new .alpha.-chlorinated chloroformates. The invention relates to a new process for the manufacture of .alpha.-chlorinated chloroformates and, to new .alpha.-chlorinated chloroformates as new industrial products. The process according to the invention consists of a synthesis, by catalytic phosgenation, of .alpha.-chlorinated chloroformates of the formula: ##STR1## in which: R represents a substituted or unsubstituted hydrocarbon radical and m represents an integer superior or equal to one, this synthesis consisting in reacting phosgene with the aldehyde R--CHO).sub.m, in the presence of a catalyst which is an organic or inorganic substance which is capable in a medium containing an aldehyde of the formula R--CHO).sub.m, phosgene and, possibly, a solvent, of generating a pair of ions one of which is an halogenide anion and the other is a cation which is sufficiently separated from said halogenide anion so as to give to the latter a nucleophilic power enabling it to react with the function(s) aldehyde of the molecule R--CHO).sub.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.