Cycloadditions of Allylsilanes - Part 22. Stereoselective Synthesis of Cyclopentanes and Cyclobutanes by Lewis Acid Promoted [3+2] and [2+2] Cycloadditions of Allylsilanes

[摘要]：

The development of Lewis acid promoted [3+2] and [2+2] cycloadditions as a novel methodology for the stereoselective construction of cyclopentanes and cyclobutanes is described. Elegant applications of this methodology to the total synthesis of biologically active terpenoid natural products are presented.

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