Metal homoenolates represent uniquely useful organometallic intermediates in synthetic chemistry, allowing umpolung synthesis of β-functionalized carbonyl compounds. While siloxycyclopropanes had been established as reliable precursors to homoenolates, often stoichiometric, for diverse carbon–carbon bond forming reactions, unprotected cyclopropanols have emerged as alternative and attractive precursors to homoenolates, often catalytically generated, in carbon–carbon and carbon–heteroatom bond-forming reactions. This review article provides an overview of the development of such homoenolate transformations, as classified with respect to the metals involved in the cyclopropane ring opening.

中文翻译：

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环丙醇通过均烯醇的金属催化转化

金属均烯醇化物代表合成化学中独特有用的有机金属中间体，允许 β-官能化羰基化合物的 umpolung 合成。虽然甲硅烷氧基环丙烷已被确定为均烯醇化物的可靠前体，通常是化学计量的，用于各种碳 - 碳键形成反应，但未受保护的环丙醇已成为均烯醇化物的替代和有吸引力的前体，通常在碳 - 碳和碳 - 杂原子键形成中催化生成反应。这篇综述文章概述了此类同烯醇化物转化的发展，根据涉及环丙烷开环的金属进行分类。