| abstract |
PROCEDURE FOR THE PREPARATION OF 4,4,7-TRIMETHYL-3,4,7,8-TETRAHYDRO-2 (6H)-NAPHTHALIN-ONE. IT CONSISTS IN SUBJECTING 3-OXO-A-JONOL OF FORMULA (II) TO AN ELIMINATION REACTION, OR: A) ADDING 3-OXO-A-JONOL TO A SOLUTION OF A PROTIC ACID IN AN INERT SOLVENT AT HIGH TEMPERATURE, AND SEGREGING THE REACTION WATER IN THE USUAL WAY; OR OB) CONVERTING 3-OXO-A-JONOL IN ITS HYPOALKYL ESTER, AND TREAT THE SAME WITH ALKALINE OR ALKALINE-EARTH HYDROXIDE OR ACETATES, IN A SOLVENT AT A TEMPERATURE OF 150 TO 300JC, TO OBTAIN 4,4,7-TRIMETHYL-3, 4,7,8-TETRAHYDRO-2 (6H)-NAPHTHALIN-ONE OF FORMULA (I). THEY ARE USEFUL AS NATURAL TOBACCO FLAVORS. |