Stereoselective synthesis of the obscure mealybug pheromone by hydrogenation of a tetrasubstituted alkene precursor
作者:Yunfan Zou、Jocelyn G. Millar
DOI:10.1016/j.tetlet.2011.06.030
日期:2011.8
An improved diastereoselective synthesis of (1R∗,2R∗,3S∗)-1-acetoxymethyl-2,3,4,4-tetramethylcyclopentane 1, the sex pheromone of the obscure mealybug, Pseudococcus viburni, is described. The key step was diastereoselective catalytic hydrogenation of the tetrasubstituted double bond in 2,3,4,4-tetramethyl-cyclopent-2-enone 4 to give the thermodynamically less favored cis-2,3,4,4-tetramethyl-cyclopentanone
描述了一种改进的非对映选择性合成的(1 R ∗,2 R ∗,3 S ∗)- 1-乙酰氧基甲基-2,3,4,4-四甲基环戊烷1(暗淡粉虱的性信息素,Pseudococcus viburni)。关键步骤是在2,3,4,4-四甲基-环戊-2-烯酮4中对四取代的双键进行非对映选择性催化加氢,得到热力学上较不受欢迎的顺式-2,3,4,4-四甲基-环戊酮3a。