Process for preparing a S-substituted phosphoro-chloridothiolate
AssigneeIshihara Sangyo Kaisha, Ltd.
InventorsYasuhiro Tsujii, Tatsuo Isogai, Takao Awazu, Tokiya Kimura
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Abstract
A process for preparing a S-substituted phosphorochloridothiolate having the formula: ##STR1## wherein R.sup.1 is a chlorine atom or an alkoxy or phenoxy group which may be substituted, and R.sup.2 is an alkyl, alkenyl, alkynyl, cycloalkyl or phenyl group which may be substituted, which comprises isomerizing an O-substituted phosphorochloridothionate having the formula: ##STR2## wherein R.sup.1 and R.sup.2 are as defined above, in the presence of a Lewis acid catalyst or a phosphorus compound catalyst.
Claims7
A process for the preparation of a S-substituted phosphorochloridothiolate having the formula:
- ##STR10## wherein R.sup.1 is selected from the group consisting of chloro, phenoxy, C.sub.1 -C.sub.6 alkoxy, and C.sub.1 -C.sub.6 alkoxy which is substituted by phenyl, phenoxy or phenylthio and wherein said phenyl, phenoxy and phenylthio substituents are unsubstituted or are each substituted by halogen, nitro, cyano, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkoxy-C.sub.1 -C.sub.6 alkyl, trifluoromethyl, halo-C.sub.1 -C.sub.6 -alkoxy, alkoxy, C.sub.1 -C.sub.6 -alkylsulfinyl, C.sub.1 -C.sub.6 -alkylsulfonyl, phenyl, phenoxy or phenylthio;
- and R.sup.2 is selected from the group consisting of phenyl, C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.2 -C.sub.6 alkynyl, and C.sub.3 -C.sub.7 -cycloalkyl;
- and wherein each of said alkyl, alkenyl, alkynyl and cycloalkyl groups are unsubstituted or substituted by phenyl, phenoxy or phenylthio;
- and wherein each of said phenyl, phenoxy or phenylthio substituents are unsubstituted or are substituted by halogen, nitro, cyano, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub. 1 -C.sub.6 -alkoxy-C.sub.1 -C.sub.6 -alkyl, trifluoromethyl, halo-C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.6 alkylsulfinyl, C.sub.1 -C.sub.6 alkylsulfonyl, phenyl, phenoxy and phenylthio;
- which process comprises:
- subjecting an O-substituted phosphorochloridothionate having the formula:
- ##STR11## wherein R.sup.1 and R.sup.2 are as defined above, to a phosphorus compound catalyst, thereby isomerizing said O-substituted phosphorochloridothionate to said S-substituted phosphorochloridothiolate;
- wherein said phosphorus compound is selected from the group consisting of inorganic phosphorus oxide and halide compounds.
Dependencies are inferred from the claim text.