Process
US5336781A · kind A · utility
2Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1992 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Oct 14, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D209/34
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for the preparation of a compound of structure (I) ##STR1## in which n is 1 to 3 and each group R is hydrogen or C.sub.1-4 alkyl, which comprises, reaction of compound of structure (II) ##STR2## (prepared by esterifying the hydroxyl compound) in which R.sup.1 is C.sub.1-4 alkyl, phenyl or substituted phenyl and n is 1 to 3, with an amine HNR.sub.2 in which R is as described for structure (I), and optionally thereafter forming a salt. Intermediates are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.