| abstract |
METHOD OF OBTAINING FOR CHROMON-8-ALDEHYDE DERIVATIVES FROM FORMULA (I) WHERE R1 AND R2 - MISCELLANEOUS RADICALS AND A LINK OR BINDING CARBON CHAIN. FORMULA (II) CHROMONS ARE REACTED WHERE R3 - HYDROGEN OR ALKYL WITH 1 TO 10 ATOMS OF CARBON, WITH OZANO AT A TEMPERATURE OF - 100 TO 20C, AND SUBSEQUENTLY PERFORMED A REDUCING PROCESSING THAT IS CARRIED OUT WITH DIMO OF ZINC, CATALYTIC HYDROGENATION OR SODIUM DITIANTO. OZANOLYSIS IS CARRIED OUT IN THE PRESENCE OF AN INERT SOLVENT SUCH AS: METHYLLNCHLORIDE, CHLOROFORM, CARBON TETRACHLORIDE, METHANOL, ETHANOL, FORMIC OR ACETIC ACID. |