Stereospecific cis- and trans-vinylic phosphorus esters
AssigneeExxon Research & Engineering Co.
InventorsAlexis A. Oswald, Joseph H. Lesser
Life of this patent
Estimating the term…
Abstract
Vinylic thiophosphorus acid esters of either cis- or trans-configuration can be synthesized in a stereospecific reaction of a cis- and a trans-vinylic metal compound with diorgano phosphoryl disulfide and a diorgano phosphoryl sulfenyl halide, respectively, and the product can be isomerized to the thermodynamically more stable mixture of isomers by free radical and ionic catalysts. The new cis- and/or trans-vinylic thiophosphorus esters are mainly useful in the field of plant and animal pesticides.
Claims11
A composition comprising an isomeric mixture of compounds having at least 70% of the trans-isomer of compounds having the general formula:
- ##STR15## wherein R.sup.1 and R.sup.2 are C.sub.1 to C.sub.30 hydrocarbyloxy radicals, R.sup.5 is a C.sub.1 to C.sub.30 hydrocarbyl radical, and X is O or S.
A composition comprising an isomeric mixture of compounds having at least an equilibrium concentration of the trans-isomer of compounds having the general formula:
- ##STR16## wherein R.sup.3 and R.sup.9 are C.sub.1 to C.sub.18 hydrocarbyl radicals, n is an integer of 1 to 30, and X is O or S.
A composition comprising an isomeric mixture of compounds having at least an equilibrium concentration of the trans-isomer of compounds having the general formula:
- ##STR17## wherein m and n are integers of 1 to 18, and X is O or S.
A composition comprising an isomeric mixture of compounds having at least an equilibrium concentration of the trans-isomer of compounds having the formula:
- ##STR18##
A composition comprising an isomeric mixture of compounds having at least an equilibrium concentration of the trans-isomer of compounds having the formula:
- ##STR19##
A composition comprising an isomeric mixture of compounds having at least 70% of the isomer having the formula:
- ##STR20## wherein m and n are integers of 1 to 18, and X is O or S.
A composition comprising an isomeric mixture of compounds having at least 70% of the isomer having the formula:
- ##STR21## wherein X is O or S.
A composition comprising an isomeric mixture of compounds having at least 70% of the isomer having the formula:
- ##STR22## wherein X is O or S.
A composition comprising an isomeric mixture of compounds having at least 70% of the isomer having the formula:
- ##STR23##
A composition comprising an isomeric mixture of compounds having at least 70% of the isomer having the formula:
- ##STR24##
A composition comprising an isomeric mixture of compounds having at least 70% of the isomer having the formula:
- ##STR25##
Dependencies are inferred from the claim text.