title: New macrocyclic musk compounds.
abstract: The syntheses and olfactory evaluations of eight new macrocyclic musks with a 1,6-dioxa structure (1a-d and 1'a-d) as well as of twelve optically active 3-methyl macrolides (5a-c and 5'a-c) are reported. These macrocycles were synthesized via intramolecular metathesis mediated by the Grubbs catalyst. Despite the absence of a C=O function, the 1,6-dioxa compounds, both unsaturated (1) and saturated (1'), possess musky odors similar to those of macrocyclic ketones and lactones. Especially 16-membered rings were found to display an intense and pleasant musk character. However, in the case of optically active 3-methyl macrolides (5, 5'), only the (R)-configured 15- and 16-membered rings had intense and pleasant musk notes.
authors.affiliation: Takasago International Corporation, Central Research Laboratory, 1-4-11 Nishi-yawata, Hiratsuka city, Kanagawa 254-0073, Japan. hiroyuki_matsuda@takasago.com
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Matsuda
authors.forename: Shinya
authors.initials: S
authors.lastname: Watanabe
authors.forename: Kenichi
authors.initials: K
authors.lastname: Yamamoto
mesh_terms: D005229:Fatty Acids, Monounsaturated / Q000138:chemical synthesis* / Q000737:chemistry; D047028:Macrocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D009812:Odorants
chemical_list: D005229:Fatty Acids, Monounsaturated; D047028:Macrocyclic Compounds; C008563:musk