Allylsilanes derived from α- and β-ionone. Synthesis and unusual reactivity with electrophiles
Silylcupration of α- and β-ionol acetates selectively gave the corresponding allylsilanes with direct substitution of the acetate with a trimethylsilyl group. Reactions of these products with electrophiles showed the unusual absence of the allylic shift, typical in nucleophilic condensations of allylsilanes. Ionotrimethylsilanes are effective building blocks for synthesis of terpenes and carotenoids.
Azzari,Faggi,Gelsomini,Taddei
p. 6067 - 6070
(2007/10/02)
Alkenoyl-cyclohexadienes
New cycloaliphatic unsaturated ketones and their use as perfuming and odour-modifying agents in the manufacture of perfumes and perfumed products, and as flavouring and taste-modifying agents in the preparation of foodstuffs in general and imitation flavours for foodstuffs, beverages, animal feeds, pharmaceutical preparations and tobacco products. Methods for the preparation of said cycloaliphatic unsaturated ketones.
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(2008/06/13)
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