Process for producing .alpha.,.beta.-unsaturated aldehydes
申请人:Takeda Chemical Industries, Ltd.
公开号:US05471004A1
公开(公告)日:1995-11-28
The present invention relates to a process for producing an .alpha.,.beta.-unsaturated aldehyde which comprises subjecting an allyl-hexamethylenetetraammonium derivative to hydrolysis in water and an organic solvent homogeneously immiscible with water. The resulting .alpha.,.beta.-unsaturated aldehyde is useful as medicaments, flavorings, etc., or as raw materials for their production.
2-METHYL-2-HEPTEN-6-ON-1-AL ACETALS AND A METHOD FOR THE PRODUCTION OF THESE COMPOUNDS. The acetals are obtained by reacting the acetals of 2-methyl-4-halo-2-buten-1-al with an alkali compound of an ester of acetoacetic acid and eliminating, by means of an alkali, the alkoxycarbonyl group from the intermediate obtained. 2-methyl-2-hepten-6-on-1-al is obtained from the acetals by acid hydrolysis. The products are perfumes having a pleasant fruity odor and are intermediates for advantageous synthesis of the natural orange aromatics and orange odorants .alpha.-sinensal and .beta.-sinensal.