Description
Colorless. viscous liquid. B.P. 239℃. Sp,Gr. 0.895. The aldehyde is conventionally sold in reduced strength, either 50% or 70% aldehyde content. The diluent may be the corresponding acetal, or an odorless solvent, e. g. Diethyl - phthalate.
Uses
Cinnamylideneacetophenone is used in perfume compositions as a floralizing aldehydic topnote ingredient, primariIy in Muguet-Lily fragrances, but also in Rose, Peony (where the Geranyl-isomer is claimed to lx superior), and various modifications of modern-aldehydic fragrance types. Occasionally used in flavor compositions for floral or fruity types, and in Rose type flavors. The concentration is usually mere traces in the finished product.
Synthesis
Cinnamylideneacetophenone is prepared from Citronellol, reacted with Sodium methylate or Sodium iso-propylate. The acetal is then prepared by reaction with Chlorodimethylacetal. The resulting acetal is finally hydrolyzed with diluted oxalic acid to yield the aldehyde.
