2-Methyl-4-nonene-3-one - and perfumes contg. it and/or 2-methyl-4-nonyl(3)one

摘要

(A) Perfume compsns. and perfumed prods. contg. 2-methyl-4 nonyn-3-one (I) and/or 2-methyl-4-nonen-3-one (II) are new. (B) Cpd. (II), of formula Me2CH-CO-CH=CH-(CH2)3Me is also new. The prepn. of (I) is described in Synthesis, 1977, 777-778. (II) can be prepd. by hydrogenating (I) in the presence of a Lindlar catalyst; the resulting Z isomer can be converted to the E isomer by acid- or base-catalysed isomerisation. (I) and (II) can be used to impart green-floral notes reminiscent of lavender and jasmine to various perfumes, cosmetics, soaps, detergents, air fresheners, etc.