Process for the preparation of thienopyridine derivatives
US4174448A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1978 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Jun 6, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a process for the preparation of compounds having the general formula: ##STR1## in which: R.sub.1 represents a hydrogen atom, an optionaly substituted alkyl, aryl or aralkyl radical; R.sub.2 and R.sub.3 are the same or different and represent independently a hydrogen atom, a lower alkyl, aryl or heterocyclic radical; and R.sub.4 represents a hydrogen atom or an alkyl, cycloalkyl, alkoxy carbonyl, carboxy, aryl or heterocyclic radical, comprising reacting a compound having the formula: ##STR2## in which R.sub.1, R.sub.2 and R.sub.3 are as defined above, with a compound having the formula: ##STR3## in which R.sub.4 is as defined above; X is a halogen atom, or an optionally substituted alkoxy, thioalkyl or amino group; and Y represents an optionally substituted alkoxy, thioalkyl or amino group, or a group of the formula: ##STR4## in which R is a lower alkyl or aryl radical; or both the groups X and Y, together with the carbon atom to which they are attached, form a 6-membered hexahydro-S-triazinic, trioxannic or trithianic heterocyclic nucleus, in an inert solvent, at a temperature between 0.degree. and 150.degree. C. and in an anhydrous medium, and, if desir…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.