Perfuming Ingredients with Odor of the Pheromone Type
申请人:Chapuis Christian
公开号:US20080280809A1
公开(公告)日:2008-11-13
The present invention relates to certain β-decalone derivatives which can impart useful odor notes of the pheromone or costus type. The present invention concerns the use of the compounds in the perfumery industry to impart such odor notes as well as to the compositions or articles that contain these compounds.
Short and Versatile Two-Carbon Ring Expansion Reactions by Thermo-Isomerization: Novel Straightforward Synthesis of (±)-Muscone, Nor- and Homomuscones, and Further Macrocyclic Ketones
作者:Matthias Nagel、Hans-Jürgen Hansen、Georg Fráter
DOI:10.1055/s-2002-19759
日期:——
the ring-expanded ketone as corresponding α-, and β-substituents, respectively. This novel thermal 1,3-C shift reaction therefore provides a new access to short syntheses of many alkyl-substituted macrocyclic ketone derivatives [e.g. (′)-muscone and analogues] in a systematic manner.
在 600 °C 至约 650 °C 的温度下,1-乙烯基取代的中环和大环环烷醇衍生物在流动反应器系统中的热异构化直接导致扩环大环酮。乙烯基部分的烷基取代基分别作为相应的α-和β-取代基局部特异性地转移到扩环的酮上。因此,这种新颖的热 1,3-C 变换反应为许多烷基取代的大环酮衍生物 [例如 (')-麝香酮和类似物] 以系统方式进行短程合成提供了新途径。
Enantioselective Routes to (-)-(<i>R</i>)-Muscone
作者:Andreas Pfaltz、Bruno Bulic、Ulrich Lücking
DOI:10.1055/s-2006-939069
日期:——
cyclopentadec-2-enone. The stereogenic center was introduced by enantioselective Cu-catalyzed conjugate addition of dimethyl-zinc. Because the ee in this step was only moderate, a new route via cyclopentadeca-2,14-dienone was developed. Enantioselective conjugate addition to this substrate led to 14-methylcylodec-2-enone, which was hydrogenated to give (-)-(R)-muscone in high overall yield with up to 98% ee.
Dialkylaluminium aryloxide in combination with a tertiary amine was found to be a good reagent for regioselective aldol condensation of methyl ketones at the methyl side. Regioselective aldol condensation of 2-octanone was carried out using diisobutylaluminium phenoxide–pyridine. The intramolecular aldol condensation of 2,15-hexadecanedione promoted by the same reagent gave a mixture of dehydromuscones