| abstract |
PURPOSE: To provide a novel 4-methyl-3-pentyl-2(5H)-furanone having an activity to stimulate the sensory organs and excellent impartation of flavor to tobacco as an arom. agent and flavor agent. n CONSTITUTION: The compd. of formula I; for example, 4-hydroxy (or acyloxy).4.methyl.3.pentyl.tetrahydrofuran-2.on. This compd. is obtd. by dehydrating the compd. of formula II (R is H, acyl, for example, 1 to 5C alkayl, for example, acetyl) by using protonic acid. The ehydration is executed preferably by using org. sulfonic acid, adequately in a solvent, for example, hydrocarbon or alcohol or ether at room temp., more preferably at en elevated temp. n COPYRIGHT: (C)1992,JPO |