摘要：

Lithium dialkylcuprate additions to a variety of 6-functionalized endo-tricyclo[5.2.1.02.6]decadienones 4 are described. The introduction of an alkyl or aryl ether function containing oxygen, sulfur or selenium leads to a remarkably high endo-stereoselectivity. The observed facial stereoselectivity of these conjugate additions to 4 is interpreted in steric and stereoelectronic terms.

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