Synthesis and Olfactory Evaluation of (4aR*,8aR*)-1,1,8a-Trimethyldecahydronaphthalen-4a-ol: A cis-Decalol Intersection Structure of (-)-Patchoulol and (5R*,6S*)-1,1,6-Trimethylspiro[4.5]decan-6-ol
作者:Reinhold Tacke、Philip Kraft、Astrid Jahnke、Christian Burschka
DOI:10.1055/s-0028-1083269
日期:2009.1
Weitz-Scheffer epoxidation of the resulting Michael system with hydrogen peroxide in the presence of sodium hydroxide and subsequent Wharton rearrangement employing hydrazine hydrate and acetic acid furnished with complete cis-selectivity (4aR*,8aR*)-8a-hydroxy-5,5-dimethyl-1,2,3,4,4a,5,6,8a-octahydronaphthalene-4a-carbonitrile (14), possibly due to neighboring group participation of the cyano function in
(-)-广atch香酚(1)和螺环广patch香气味剂(5 R *,6 S *)-1,1,6-三甲基螺[4.5] decan-6-ol(3)的叠加分析表明相交结构(4a S *,8a S *)-1,1,8a-三甲基十氢萘-4a-ol(4)作为潜在的广oul香。合成从异丁烯二氧化物的罗宾逊环化反应与2-氰基环己酮开始,可通过吡美腈的分子内环化获得。在氢氧化钠存在下,用过氧化氢对所得的迈克尔体系进行Weitz-Scheffer环氧化,随后采用水合肼和乙酸,并以完全的顺式进行沃顿重排-选择性(4a R *,8a R *)- 8a-羟基-5,5-二甲基-1,2,3,4,4a,5,6,8a-八氢萘-4a-腈 (14)氰基官能团在环氧化步骤中的相邻基团的参与。随后用钯/碳作为催化剂将烯丙基双键氢化,然后用DIBAL-H还原腈基,得到(4a R *,8a R *)- 8a-(氨基甲基)-1,1-二甲基十