Claims
- 1. A method for the synthesis of an amidine sulfonic acid of the following formula (I): ##STR6## wherein R.sup.1, R.sup.2 and R.sup.3 are independently hydrogen, NH.sub.2, perhaloalkyl, perhaloaryl, NO.sub.2, an organic group or are joined to form an organic group, which comprises oxidizing a thiourea of the following formula (II): ##STR7## with hydrogen peroxide by the addition of a molybdenum (VI) catalyst and ultraviolet visible light or an aliquot of reaction mixture which itself was subjected to ultraviolet visible light for a time sufficient to initiate the oxidation.
- 2. The method of claim 1, wherein R.sup.1 is hydrogen.
- 3. The method of claim 1, wherein R.sup.1 and R.sup.2 are hydrogen.
- 4. The method of claim 1, wherein R.sup.1, R.sup.2 and R.sup.3 are hydrogen.
- 5. The method of claim 1, wherein R.sup.1 and R.sup.3 are hydrogen.
- 6. The method of claim 1, wherein R.sup.1 is hydrogen and R.sup.2 and R.sup.3 are joined to form a substituted or unsubstituted dimethylene or trimethylene group.
- 7. The method of claim 1, wherein said organic group is alkyl, substituted alkyl, cyclic alkyl, substituted cyclic alkyl, aryl, substituted aryl, heterocyclic or substituted heterocyclic.
- 8. The method of claim 1, wherein said added molybdenum catalyst is a molybdate of the formula QMoO.sub.4 where Q is two ions having a +1 valence or one ion having a +2 valence.
- 9. The method of claim 8, wherein said added molybdenum catalyst is QMoO.sub.4 and Q is (NH.sub.4).sub.2, H.sub.2 or Na.sub.2.
- 10. The method of claim 9, wherein said added molybdenum catalyst is Na.sub.2 MoO.sub.4 .multidot.2H.sub.2 O.
- 11. The method of claim 1, wherein said oxidizing is conducted in the presence of ultraviolet visible light.
- 12. The method of claim 1, wherein said oxidizing is conducted in the presence of seed reaction mixture which had been exposed to ultraviolet visible light for a time sufficient to initiate the oxidation.
- 13. The method of claim 1, wherein said oxidizing is conducted in a vessel which is closed to ultraviolet visible light.
Parent Case Info
This application is a division of U.S. Ser. No. 934,376 filed Nov. 24, 1986 now U.S. Pat. No. 4,781,866 which is a division of U.S. Ser. No. 868,231 filed May 28, 1986, now U.S. Pat. No. 4,656,291, which is a continuation-in-part of U.S. Ser. No. 711,948 filed Mar. 15, 1985, now U.S. Pat. No. 4,656,270.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4381395 |
Teraji et al. |
Apr 1983 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
178803 |
Feb 1966 |
SUX |
1587258 |
Apr 1981 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Chemical Abstracts, vol. 76, p. 430, 59163c (1972). |
Divisions (2)
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Number |
Date |
Country |
Parent |
934376 |
Nov 1986 |
|
Parent |
868231 |
May 1986 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
711948 |
Mar 1985 |
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