Pentanal → 3-pentylidene-5-n-butyldihydro-2(3H)-furanone

Participants

Reaction Steps

Two reactions were carried out in accordance with the process of the invention using valeraldehyde. For one reaction (Example VI) 3-acetyl-dihydro-2(3H)-furanone was used and for the second reaction (Example VII) 3-acetyl-5-n-butyldihydro-2(3H)-furanone was employed. Both reactions used sodium hydroxide with toluene as the diluent and the reactants were present in essentially equimolar amounts. 3-Pentylidene-dihydro-2(3H)-furanone (86°-104° C. at 0.1 mm/Hg) and 3-pentylidene-5-n-butyldihydro-2(3H)-furanone (110°-131° C. at 0.01 mm/Hg) were obtained from the respective reactions. Proton nuclear magnetic resonance spectra for the products were as follows:

Provenance & Evidence