[EN] ALCOHOLS AND KETONES OF BI- AND TRICYCLIC COMPOUNDS AND ODORANT COMPOSITIONS<br/>[FR] ALCOOLS ET CETONES DE COMPOSES BICYCLIQUES ET TRICYCLIQUES ET COMPOSITIONS ODORANTES
申请人:GIVAUDAN SA
公开号:WO2004000776A1
公开(公告)日:2003-12-31
Novel compounds of formula (I) and their use in flavour and fragrance compositions. R1 to R13 have the meaning as described in the specification.
Stereoselective synthesis of cyclohexa-2,4-dien-1-ones and cyclohex-2-en-1-ones from phenols
作者:Martin A. Lovchik、Andreas Goeke、Georg Fráter
DOI:10.1016/j.tetasy.2006.06.017
日期:2006.7
A convenient synthetic method for the synthesis of substituted cyclohex-2-en-1-ones by the direct alkylation of phenols has been developed. Furthermore, enantiomerically enriched 2,6-dimethyl-6-(3-methylbut-2-enyl)-cyclohexa-2,4-dienone was prepared by the deprotonation of 2,6-dimethylphenol with a sparteine-lithium complex followed by alkylation with 1-chloro-3-methylbut-2-ene. 2,6-Dimethyl-6-(3-methyl-but-2-enyl)-cyclohex-2-enone was prepared from the corresponding cyclohexa-2,4-dien-1-one by selective hydrogenation of the 4,5-double bond. The method was extended to 2-methyl-naphthalen-1-ol and 1-methyl-naphthalen-2-ol resulting in 2-(R)methyl-2-(3-methylbut-2-enyl)-2H-naphthalen- 1-one and 1-(S)-methyl-1-(3-methylbut-2-enyl)-1H-naphthalen-2-one, respectively. (c) 2006 Elsevier Ltd. All rights reserved.
Alkyl Aluminum Halide Promoted Intramolecular Cyclization of?-Allyl-cycloalk-2-enones: Access to Bridged Bi- and Tricyclic Compounds