Vilsmeier Formylation of Limonene. A New Method for the Synthesis of α-Atlantone

Synthesis of both isomers of aziridine derived from the mixture of cis- and trans-limonene oxide

A short and efficient route is described for both isomers of aziridine derived from the commercially available 1:1 mixture of limonene oxides. The process is amenable to scale-up and allows easy access to multigram quantities of these useful chiral building blocks.

Synthesis of ionones and carvone analogues: olfactory properties and preliminary toxicity assays

Vilsmeier reagents react with alpha/beta-ionones and carvone to produce aldehydes 7-11 in a one-step procedure. The indene derivative 11, which came from the double iminoalkylation of carvone and ring closure with the elimination of dimethylamine, was practically odourless, while all the others had peculiar odours which were very different from the starting material. The cytotoxicity data of 9 and 10, which are the most promising potential perfume ingredients, are also reported.