作者:Donghui Zhang、Joseph M. Ready
DOI:10.1021/ol052413g
日期:2005.12.1
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。