Desymmetrization of Metalated Cyclohexadienes and Application to the Synthesis of Nephrosteranic Acid
作者:Florian Schleth、Armido Studer
DOI:10.1002/anie.200352254
日期:2004.1.5
Desymmetrization of 1,4-Cyclohexadienyltriisopropoxysilane Using Copper Catalysis
作者:Rui Umeda、Armido Studer
DOI:10.1021/ol070689d
日期:2007.5.1
The first catalytic desymmetrization in the field of allylsilane chemistry is presented. Desymmetrization of cyclohexadienyltriisopropoxysilane is achieved using coppper catalysis. High diastereo- and enantioselectivities are obtained, and the product dienes are highly valuable building blocks for natural product synthesis.
Stereoselective Synthesis of (+)-Nephrosteranic Acid, (+)-trans-Cognac Lactone, and (+)-trans-Whisky Lactone using a Chiral Cyclohexadienyl Ti Compound
3-dioxolandimethanol) cyclohexadienyl Ti derivative with various aldehydes led to the corresponding homoallylicalcohols with excellent diastereo- and enantioselectivities. Lower selectivities were obtained with chiral B-cyclohexadienyldiisopinocampheylborane. The 1,3-cyclohexadienes are very useful building blocks for the preparation of biologically important gamma-butyrolactones. Short efficient syntheses of (+)-nephrosteranic