Electroorganic Reactions. Part 45. The Highly Stereoselective Electrochemical Hydrodimerisation of Methyl 4-tert-Butylcyclohex-1-enecarboxylate.
作者:James H.P. Utley、Mustafa Güllü、Cristina I. De Matteis、Majid Motevalli、Merete Folmer Nielsen
DOI:10.1016/0040-4020(95)00748-w
日期:1995.10
confirmed by X-ray crystallography. Kinetic experiments, combined with force field calculations, indicate radicalanion/radical-anion coupling which is under stereoelectronic control and which dictates diaxial coupling of the cyclohexyl rings. Protonation of the resulting dimeric dianion is under thermodynamic control.
4-叔丁基环己-1-烯甲酸甲酯在DMF溶液中的汞阴极处进行1 F还原,以提供主要的单一产物,即其中的环己基环轴向连接且甲氧基羰基也轴向连接的加氢二聚体。该结构通过X射线晶体学确认。动力学实验与力场计算相结合,表明自由基阴离子/自由基-阴离子偶联处于立体电子控制下,决定了环己基环的双轴偶联。所得二聚二价阴离子的质子化处于热力学控制下。