| abstract |
2-(HO-),3,4,5,6-TETRA(R1-)PYRIDINE WITH AN AMINE H2N-R WHEREIN THE SYMBOLS R1 REPRESENT HYDROGEN, ALKYL, CYCLOALKYL, ARYL OR ARALKYL, OR THE SYMBOLS R1 ON ADJACENT CARBON ATOMS FROM A DIVALENT SATURATED OR UNSATURATED RADICAL, AND R HAS THE SAME SIGNIFICANCE AS R1 OR REPRESENTS A MONOVALENT HETEROCYCLIC AROMATIC RADICAL. A NEW PROCESS FOR THE PREPARATION OF PRIMARY AND SECONDARY 2-AMINO-PYRIDINES WHICH CAN BE USED AS STARTING MATERIALS FOR THERAPEUTICALLY ACTIVE SUBSTANCES (E.G. ANTI-HISTAMINES), COMPRISES REACTING AT A TEMPERATURE BELOW 200* TO 500*C. A 2-HYDROXYPYRIDINE OF THE FORMULA: |