Design and Synthesis of Violet Odorants with Bicyclo[6.4.0]dodecene and Bicyclo[5.4.0]undecene Skeletons
作者:Philip Kraft
DOI:10.1055/s-1999-3444
日期:1999.4
The Diels-Alder reaction of 1,2-bis(methylene)cyclooctane (13), 4-methylenespiro[2,7]decane (29), 4-methylene-spiro[2.6]nonane (40) and 4-methylenespiro[2,7]dec-8-ene (46) with different α,β-unsaturated carbonyl compounds afforded various derivatives 16, 18, 20, 22, 24, 26, 32, 36, 38, 41, 42 and 47 of a molecular-modeled lead compound 9. These less flexible β-ionone-mimics with bicyclo[6.4]dodecene and bicyclo[5.4.0]undecene skeletons possess interesting fruity-woody-floral odor notes and provide insight into the structure-odor correlation of violet odorants. 5-(2-Methylcycloalk-1-en-1-yl)hex-3-en-2-ones (e. g. 35) were identified as byproducts of the Rh(I)-catalyzed reactions of the vinylcyclopropanes 29 and 40.
1,2-双(亚甲基)环辛烷(13)、4-亚甲基螺[2,7]癸烷(29)、4-亚甲基螺[2.6]壬烷(40)和4-亚甲基螺[2,7]癸-8-烯(46)与不同的α,β-不饱和羰基化合物进行Diels-Alder反应,得到了分子模型化合物的各种衍生物16、18、20、22、24、26、32、36、38、41、42和47。这些较不灵活的双环[6.4]十二碳烯和双环[5.4.0]十一碳烯骨架的β-紫罗兰酮类似物,具有有趣的果香-木香-花香气味特征,并为进一步了解紫罗兰酮类化合物的结构与气味相关性提供了见解。5-(2-甲基环烷-1-烯-1-基)己-3-烯-2-酮(例如35)被确认为乙烯基环丙烷29和40在Rh(I)催化反应中的副产物。