Method for preparing aromatic urethans
US4100351A · kind A · utility
11Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1977 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Mar 24, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C271/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the preparation of aromatic urethans, a dialkyl carbonate is reacted with an N-acyl derivative of an amine: thus, for example, by reacting acetanilide with a lower dialkyl carbonate, such as DMC or DEC, in the presence of titanium tetraphenate (Lewis' acid), phenylmethyl urethan is obtained with a yield over 90%. No toxic reactants are used and the reaction has outstandingly high yields and conversion ratings. The urethane in question are useful as weed-killers and pesticides in agriculture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.