their enol derivatives is described. Carbocupration of terminal alkynes and subsequent oxygenation with lithium tert-butyl peroxide generates a metallo-enolate. Trapping with various electrophiles provides alpha-branched aldehydes or stereo-defined trisubstituted enol esters or silyl ethers. The tandem carbocupration/oxygenation tolerates alkyl and silyl ethers, esters, and tertiary amines. The reaction
                                    [
化学反应:见正文]。描述了α-支化醛及其烯醇衍
生物的直接和一般合成。末端
炔烃的碳化和随后用叔丁基
过氧化锂的氧合生成
金属烯醇盐。与各种亲电试剂的陷阱提供了α-支链的醛或立体定义的三取代的烯醇酯或甲
硅烷基醚。串联碳cup合/加氧可耐受烷基和甲
硅烷基醚,酯和叔胺。该反应对衍生自伯,仲和叔
格氏试剂和
正丁基锂的
有机铜配合物有效。