Process for preparing organic phosphorus compounds
US4196155A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1978 |
| Grant date | Apr 1, 1980 |
| Priority date | — |
| Expiry date | Jun 27, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S260/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing an organic phosphorous compound of the general formula ##STR1## wherein R.sub.A represents ##STR2## where X.sup.1 is a halogen atom, Y is --CH.sub.2 -- or --CH.sub.2 --C.sub.2 --, and PA1 R.sub.1 is H or CH.sub.3 when Y is --CH.sub.2 --CH.sub.2 --, or H, CH.sub.3 or C.sub.2 H.sub.5 when Y is --CH.sub.2 --, R.sub.B represents an alkyl group having from 1 to 4 carbon atoms or a halogenated alkyl group having from 2 to 4 carbon atoms, R.sub.C represents ##STR3## where X.sup.2 is a halogen atom, Z is --CH.sub.2 --or --CH.sub.2 --CH.sub.2 --, and PA1 R.sub.2 is H or CH.sub.3 when Z is --CH.sub.2 --CH.sub.2 --, or H, CH.sub.3 or C.sub.2 H.sub.5 when Z is --CH.sub.2 --, and R.sub.D represents an alkyl group having from 1 to 4 carbon atoms or a halogenated alkyl group having from 2 to 4 carbon atoms, the process including the steps of reacting a cyclic halogenophosphite with a cyclic phosphorous acid and acetone in a molar ratio of 1:1:1, reacting the resulting product with a molecular halogen X.sub.2.sup.2 wherein X.sup.2 is as defined above to obtain a first product and, esterifying said first product with an alkyl alcohol or halogenated alkyl alcohol or an alkyle…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.