Method of preparing sulfonimide or its salt
First Claim
1. A method of preparing a sulfonimide represented by the general formula (1), a first salt thereof represented by the general formula (2), or a second salt thereof represented by the general formula (3), the method comprising the step of:
- (a) reacting one or two sulfonyl fluorides represented by the general formula (4) with nonhydrous ammonia and an amine component which is one of a tertiary amine represented by the general formula (5) and a heterocyclic amine, so as to prepare said first salt,
space="preserve" listing-type="equation">H Rf.sup.1 SO.sub.2 --N--SO.sub.2 Rf.sup.2 ! (1)wherein "Rf1 " and "Rf2 " represent the same or different groups each of which has a carbon atom number from 1 to 12 and is straight-chain or branched-chain and one selected from the group consisting of perfluoroalkyl groups, fluoroalkyl groups, fluoroalkenyl groups and fluoroallyl groups,
space="preserve" listing-type="equation">M.sup.1 Rf.sup.1 SO.sub.2 --N--SO.sub.2 Rf.sup.2 !.sub.n1 (
2)wherein "Rf1 " and "Rf2 " are defined as above;
"M1 " represents a positive ion having a first valence; and
"n1" represents an integer that is the same as said first valence,
space="preserve" listing-type="equation">M.sup.2 Rf.sup.1 SO.sub.2 --N--SO.sub.2 Rf.sup.2 !.sub.n2 (
3)wherein "Rf1 " and "Rf2 " are defined as above;
"M2 " represents an alkali or alkali earth metal atom having a second valence; and
"n2" represents an integer that is the same as said second valence,
space="preserve" listing-type="equation">RfSO.sub.2 F (4)wherein "Rf" represents the same or different groups which are identical with said "Rf1 " and said "Rf2 ",
space="preserve" listing-type="equation">(R.sub.1).sub.3 N (5)wherein "R1 " represents the same or different alkyl groups each having a carbon atom number from 1 to 5.
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Abstract
The invention relates to a method of preparing a sulfonimide, a first salt thereof, or a second salt thereof. The method includes the step of: (a) reacting one or two sulfonyl fluorides with nonhydrous ammonia and an amine component which is one of a tertiary amine and a heterocyclic amine, so as to prepare the first salt. Alternatively, the method includes the step of: (a) reacting the sulfonyl fluoride with the amine component and a sulfonamide, so as to prepare the first salt. The method further optionally includes, after the step (a), the step of: (b) reacting, in an aqueous solution, the first salt with a metal compound, so as to prepare the second salt. The method still further optionally includes, after the step (a), the step of: (c) reacting the first salt with a strong acid so as to prepare the sulfonimide. Alternatively, the method further optionally includes, after the step (b), the step of: (d) reacting the second salt with a strong acid so as to prepare the sulfonimide. The sulfonimide, the first salt or the second salt is easily economically prepared in an industrial scale production with high purity and high yield.
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Citations
14 Claims
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1. A method of preparing a sulfonimide represented by the general formula (1), a first salt thereof represented by the general formula (2), or a second salt thereof represented by the general formula (3), the method comprising the step of:
(a) reacting one or two sulfonyl fluorides represented by the general formula (4) with nonhydrous ammonia and an amine component which is one of a tertiary amine represented by the general formula (5) and a heterocyclic amine, so as to prepare said first salt,
space="preserve" listing-type="equation">H Rf.sup.1 SO.sub.2 --N--SO.sub.2 Rf.sup.2 ! (1)wherein "Rf1 " and "Rf2 " represent the same or different groups each of which has a carbon atom number from 1 to 12 and is straight-chain or branched-chain and one selected from the group consisting of perfluoroalkyl groups, fluoroalkyl groups, fluoroalkenyl groups and fluoroallyl groups,
space="preserve" listing-type="equation">M.sup.1 Rf.sup.1 SO.sub.2 --N--SO.sub.2 Rf.sup.2 !.sub.n1 (
2)wherein "Rf1 " and "Rf2 " are defined as above;
"M1 " represents a positive ion having a first valence; and
"n1" represents an integer that is the same as said first valence,
space="preserve" listing-type="equation">M.sup.2 Rf.sup.1 SO.sub.2 --N--SO.sub.2 Rf.sup.2 !.sub.n2 (
3)wherein "Rf1 " and "Rf2 " are defined as above;
"M2 " represents an alkali or alkali earth metal atom having a second valence; and
"n2" represents an integer that is the same as said second valence,
space="preserve" listing-type="equation">RfSO.sub.2 F (4)wherein "Rf" represents the same or different groups which are identical with said "Rf1 " and said "Rf2 ",
space="preserve" listing-type="equation">(R.sub.1).sub.3 N (5)wherein "R1 " represents the same or different alkyl groups each having a carbon atom number from 1 to 5. - View Dependent Claims (2, 3, 4, 9, 11, 12)
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5. A method of preparing a sulfonimide represented by the general formula (1), a first salt thereof represented by the general formula (2), or a second salt thereof represented by the general formula (3), the method comprising the step of:
(a) reacting a sulfonyl fluoride represented by the general formula (4) with an amine component which is one of a tertiary amine represented by the general formula (5) and a heterocyclic amine and a sulfonamide represented by the general formula (6),
space="preserve" listing-type="equation">H Rf.sup.1 SO.sub.2 --N--SO.sub.2 Rf.sup.2 ! (1)wherein "Rf1 " and "Rf2 " represent the same or different groups each of which has a carbon atom number from 1 to 12 and is straight-chain or branched-chain and one selected from the group consisting of perfluoroalkyl groups, fluoroalkyl groups, fluoroalkenyl groups and fluoroallyl groups,
space="preserve" listing-type="equation">M.sup.1 Rf.sup.1 SO.sub.2 --N--SO.sub.2 Rf.sup.2 !.sub.n1 (
2)wherein "Rf1 " and "Rf2 " are defined as above;
"M1 " represents a positive ion having a first valence; and
"n1" represents an integer that is the same as said first valence,
space="preserve" listing-type="equation">M.sup.2 Rf.sup.1 SO.sub.2 --N--SO.sub.2 Rf.sup.2 !.sub.n2 (
3)wherein "Rf1 " and "Rf2 " are defined as above;
"M2 " represents an alkali or alkali earth metal atom having a second valence; and
"n2" represents an integer that is the same as said second valence,
space="preserve" listing-type="equation">RfSO.sub.2 F (4)wherein "Rf" represents the same or different groups which are identical with said "Rf1 " and said "Rf2 ",
space="preserve" listing-type="equation">(R.sup.1).sub.3 N (5)wherein "R1 " represents the same or different alkyl groups each having a carbon atom number from 1 to 5,
space="preserve" listing-type="equation">RfSO.sub.2 NH.sub.2 (
6)wherein "Rf" is defined as above. - View Dependent Claims (6, 7, 8, 10, 13, 14)
Specification