| abstract |
A PROCEDURE FOR THE PREPARATION OF A DISUBSTITUTED CYCLOPENTADIENE DERIVATIVE. A FULVENO (II) IS REACTED WITH AN ALDEHYL OR KETONE IN THE PRESENCE OF A BASIC CATALYST WITH WHICH THE DERIVATIVE (I) OR ITS ISOMERS OR MIXTURES IS OBTAINED; R <1 AND R <2 ARE INDIVIDUALLY A HYDROCARBON WITH 1 TO 10 CARBON ATOMS OR A HYDROCARBON WITH ONE OR MORE OXYGEN BRIDGES IN THE CHAIN; R <3, R <4, R <5 AND R <6 ARE HYDROGEN, METHYL OR R <7-C = R <8 PROVIDED THAT ONLY ONE OF THEM IS METHYL; ALWAYS AND WHEN R <1, R <2, R <7 AND R <8 ARE METHYL, THE AMOUNT OF ALDEHYL OR KETONE USED IS AT LEAST TWICE THE NECESSARY STECHOMETRIC AMOUNT. |