Claims
- 1. A selective process for making a carbamate, said process comprising reacting a primary formamide with an alcohol in the presence of a Group VIII transition metal compound at a temperature and for a time sufficient to produce the carbamate.
- 2. The process of claim 1 wherein the primary formamide has the formula: ##STR5## in which A is a C.sub.1 -C.sub.30 linear, branched, or cyclic alkyl, aryl, or aralkyl group, and x is an integer from 1 to 6.
- 3. The process of claim 1 wherein the primary formamide is a mono-, di-, or polyformamido derivative of benzene, toluene, diphenylmethane, poly(phenylmethylene), isophorone, or hexane.
- 4. The process of claim 1 wherein the alcohol has the structure R"OH in which R" is a C.sub.1 -C.sub.30 linear, branched, or cyclic alkyl or aryl-substituted alkyl group.
- 5. The process of claim 1 wherein the Group VIII transition metal compound contains a metal selected from the group consisting of ruthenium, platinum, and rhodium.
- 6. The process of claim 1 wherein the process is performed at a temperature within the range of about 150.degree. C. to about 200.degree. C.
- 7. The process of claim 1 wherein the process is performed in the presence of an aromatic hydrocarbon solvent.
- 8. A selective process for making an aromatic carbamate, said process comprising reacting a primary aromatic formamide with a an alcohol in the presence of a Group VIII transition metal compound at a temperature greater than about 150.degree. C. for a time sufficient to produce the aromatic carbamate.
- 9. The process of claim 8 wherein the primary aromatic formamide has the formula: ##STR6## in which A is a C.sub.1 -C.sub.30 aryl or alkyl-substituted aryl group, and x is an integer from 1 to 6.
- 10. The process of claim 8 wherein the primary aromatic formamide is a mono-, di-, or polyformamido derivative of benzene, toluene, diphenylmethane, or poly(phenylmethylene).
- 11. The process of claim 8 wherein the alcohol has the structure R"OH in which R" is a C.sub.1 -C.sub.30 linear, branched, or cyclic alkyl or aryl-substituted alkyl group.
- 12. The process of claim 8 wherein the Group VIII transition metal compound contains a metal selected from the group consisting of ruthenium, rhodium, and plantinum.
- 13. The process of claim 8 wherein the process is performed at a temperature within the range of about 150.degree. C. to about 200.degree. C.
- 14. The process of claim 8 wherein the process is performed in the presence of an aromatic hydrocarbon solvent.
Parent Case Info
This is a division of application Ser. No. 07/782,027, filed Oct. 24, 1991, now U.S. Pat. No. 5,155,267, issued Oct. 13, 1992.
US Referenced Citations (9)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0014103 |
Aug 1980 |
EPX |
2908250 |
Sep 1980 |
DEX |
Non-Patent Literature Citations (1)
Entry |
J. Chem. Soc., Chem. Commun (1990) 549. |
Divisions (1)
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Number |
Date |
Country |
Parent |
782027 |
Oct 1991 |
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