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US 5,705,651 AGranted
Process for producing a 3,4-alkylene-1,3,4-thiadiazolidin-2-one and intermediates for the same
AssigneeMitsubishi Chemical Corporation
InventorsChikako Ota, Bunji Natsume
Life of this patent
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Abstract
According to the process of the present invention, a 3,4-alkylene-1,3,4-thiadiazolidin-2-one, which is useful as a herbicide, can be easily produced in a high yield by reacting a 1,3,4-thiadiazolidin-2-one with a dihaloalkane in the presence of a base.
Claims12
A process for producing 3,4-alkylene-1,3,4-thiadiazolidin-2-one represented by the formula (III):
- ##STR7## wherein R.sup.1 represents a hydrogen atom or an inert substituent;
- R.sup.2 represents a halogen atom, a nitro group, a methyl group or a methoxy group;
- R.sup.3 represents a hydrogen atom or a halogen atom;
- and n represents an integer of from 3 to 5, which comprises reacting a 1,3,4-thiadiazolidin-2-one represented by the formula (I):
- ##STR8## wherein R.sup.1, R.sup.2 and R.sup.3 are each as defined above, with a dihaloalkane represented by the formula (II):
- X(CH.sub.2).sub.n X (II)
- wherein X represents a halogen atom;
- and n is as defined above, in the presence of a base.
5 more elements
Dependencies are inferred from the claim text.