Stereoselective Preparation of (Z)-2-(Trialkylsilyloxy)-2-alkenals by Retrocycloaddition Reactions of 4H-4-Alkyl-5-(trialkylsilyloxy)-1,3-dioxins. Useful Reactants for Lewis Acid Catalyzed [4 + 3] Cyclizations
摘要:
[GRAPHICS]Retrocycloadditions of 4H-4-alkyl-5-(trialylsilyloxy)-1,3-dioxins proceed smoothly in refluxing toluene to afford (Z)-2-(trialkylsilyloxy)-2-alkenals with complete stereos electivity. These enals undergo Sasaki-type [4 + 3] cyclizations with dienes in the presence of Lewis acids, in many instances with excellent regio- and/or stereoselectivity.
Stereoselective Preparation of (Z)-2-(Trialkylsilyloxy)-2-alkenals by Retrocycloaddition Reactions of 4H-4-Alkyl-5-(trialkylsilyloxy)-1,3-dioxins. Useful Reactants for Lewis Acid Catalyzed [4 + 3] Cyclizations
摘要:
[GRAPHICS]Retrocycloadditions of 4H-4-alkyl-5-(trialylsilyloxy)-1,3-dioxins proceed smoothly in refluxing toluene to afford (Z)-2-(trialkylsilyloxy)-2-alkenals with complete stereos electivity. These enals undergo Sasaki-type [4 + 3] cyclizations with dienes in the presence of Lewis acids, in many instances with excellent regio- and/or stereoselectivity.
Stereoselective Preparation of (<i>Z</i>)-2-(Trialkylsilyloxy)-2-alkenals by Retrocycloaddition Reactions of 4<i>H</i>-4-Alkyl-5-(trialkylsilyloxy)-1,3-dioxins. Useful Reactants for Lewis Acid Catalyzed [4 + 3] Cyclizations
作者:Ronald A. Aungst、Raymond L. Funk
DOI:10.1021/ol016668f
日期:2001.11.1
[GRAPHICS]Retrocycloadditions of 4H-4-alkyl-5-(trialylsilyloxy)-1,3-dioxins proceed smoothly in refluxing toluene to afford (Z)-2-(trialkylsilyloxy)-2-alkenals with complete stereos electivity. These enals undergo Sasaki-type [4 + 3] cyclizations with dienes in the presence of Lewis acids, in many instances with excellent regio- and/or stereoselectivity.