Process for preparing phosphorus containing cyanohydrins
AssigneeBASF SE
InventorsHans-Joachim Ressel, Kilian Tellman, Mark James Ford, Martin Littmann, Friedrich August Muehlthau, Guenter Schlegel
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Abstract
The present invention relates primarily to a process for preparing certain phosphorus-containing cyanohydrins of the formula (I), and also to certain phosphorus-containing cyanohydrins per se and to their use for the preparation of glufosinate and/or glufosinate salts. The present invention further relates to certain mixtures particularly suitable for preparing the phosphorus-containing cyanohydrins of the formula (I).
Claims20
An apparatus comprising a first mixture of one or more compounds of the formula (IV) and one or more compounds of the formula (II) in a vessel
- and
- a second mixture comprising:
- one or more compounds of the formula (II) and one or more compounds of the formula (III) in a separate vessel,
- where the compounds of the formula (II) and (III) are as follows:
- R1 is (C1-C12)-alkyl, (C1-C12)-haloalkyl, (C6-C10)-aryl, (C6-C10)-haloaryl, (C7-C10)-aralkyl, (C7-C10)-haloaralkyl, (C4-C10)-cycloalkyl or (C4-C10)-halocycloalkyl,
- R2 is (C1-C12)-alkyl, (C1-C12)-haloalkyl, (C6-C10)-aryl, (C6-C10)-haloaryl, (C7-C10)-aralkyl, (C7-C10)-haloaralkyl, (C4-C10)-cycloalkyl or (C4-C10)-halocycloalkyl,
- R3 and R4 are in each case independently of one another hydrogen, (C1-C4)-alkyl, phenyl or benzyl,
- X is oxygen or sulphur, and
- n is 0 or 1
- and the compounds of the formula (IV) have the structure as follows:
- where
- R5 is methyl, ethyl, 2,2-dimethylpropyl or phenyl,
- R6 independently at each occurrence is (C1-C10)-alkyl,
- and
- R7 is hydrogen or (C1-C10)-alkyl.
An apparatus comprising a first mixture of one or more compounds of the formula (IV) and one or more compounds of the formula (III) in a vessel
- and
- a second mixture comprising
- one or more compounds of the formula (II) and one or more compounds of the formula (III) in a separate vessel,
- where the compounds of the formula (II) and (III) are as follows:
- R1 is (C1-C12)-alkyl, (C1-C12)-haloalkyl, (C6-C10)-aryl, (C6-C10)-haloaryl, (C7-C10)-aralkyl, (C7-C10)-haloaralkyl, (C4-C10)-cycloalkyl or (C4-C10)-halocycloalkyl,
- R2 is (C1-C12)-alkyl, (C1-C12)-haloalkyl, (C6-C10)-aryl, (C6-C10)-haloaryl, (C7-C10)-aralkyl, (C7-C10)-haloaralkyl, (C4-C10)-cycloalkyl or (C4-C10)-halocycloalkyl,
- R3 and R4 are in each case independently of one another hydrogen, (C1-C4)-alkyl, phenyl or benzyl,
- X is oxygen or sulphur, and
- n is 0 or 1
- and the compounds of the formula (IV) have the structure as follows:
- where
- R5 is methyl, ethyl, 2,2-dimethylpropyl or phenyl,
- R6 independently at each occurrence is (C1-C10)-alkyl,
- and
- R7 is hydrogen or (C1-C10)-alkyl.
Dependencies are inferred from the claim text.