A three-component radical coupling reaction of aryl alkenes or 1,3-enynes with tert-butyl hydroperoxide and formamides for the efficient synthesis of β-peroxy amides.
Cu
<sup>I</sup>
‐Catalyzed Sequential Diamination and Dehydrogenation of Terminal Olefins: A Facile Approach to Imidazolinones
作者:Yingguang Zhu、Yian Shi
DOI:10.1002/chem.201404381
日期:2014.10.20
Diamination of olefins presents a powerful strategy to access vicinal diamines. During the last decade, metal‐catalyzed diamination of olefins has received considerable attention. This study describes an efficient sequential diamination and dehydrogenation process of terminalolefins with CuBr as catalyst and di‐tert‐butyldiaziridinone as nitrogen source, providing a facile and viable approach to a
Diastereo- and Enantioselective Reactions of Bis(pinacolato)diboron, 1,3-Enynes, and Aldehydes Catalyzed by an Easily Accessible Bisphosphine–Cu Complex
作者:Fanke Meng、Fredrik Haeffner、Amir H. Hoveyda
DOI:10.1021/ja5071202
日期:2014.8.13
bis-phosphine and are complete in 8 h at ambient temperature; products are generated in 66–94% yield (after oxidation or catalytic cross-coupling), 90:10 to >98:2 diastereomeric ratio, and 85:15–99:1 enantiomeric ratio. Aryl-, heteroaryl-, alkenyl-, and alkyl-substituted aldehydes and enynes can be used. Utility is illustrated through catalytic alkylation and arylation of the organoboron products as well as applications
公开了涉及双(频哪醇)二硼[B2(pin)2]、1,3-烯炔和醛的催化对映选择性多组分方法;所得化合物含有主 C-B(pin) 键,以及炔烃和羟基取代的叔碳立体中心。一个关键特征是初始对映选择性 Cu-B(pin) 加成到炔烃取代的末端烯烃上。这个问题和其他关键的机械问题已经通过 DFT 计算进行了研究。反应由市售对映体纯双膦的 Cu 配合物促进,并在环境温度下 8 小时内完成;产物的产率为 66–94%(氧化或催化交叉偶联后),非对映体比例为 90:10 至 >98:2,对映体比例为 85:15–99:1。可以使用芳基-、杂芳基-、烯基-和烷基-取代的醛和烯炔。通过有机硼产物的催化烷基化和芳基化以及在泰洛内酯和霉素 IV 片段的合成中的应用来说明其实用性。
Copper-Catalyzed Silylperoxidation Reaction of α,β-Unsaturated Ketones, Esters, Amides, and Conjugated Enynes
A synthetic method of copper-catalyzed silylperoxidation of α,β-unsaturated carbonyl compounds and conjugated enynes has been developed. The realization of silylperoxidation of the carbon–carbon double bond permits direct access to silicon-containing peroxy products in moderate to good yields. Furthermore, this protocol distinguishes itself by operational simplicity and exhibiting good tolerance of
Stereoselective Synthesis of Allenyl Alcohols by Cobalt(III)‐Catalyzed Sequential C−H Bond Addition to 1,3‐Enynes and Aldehydes
作者:Chaofan Xu、Joseph P. Tassone、Brandon Q. Mercado、Jonathan A. Ellman
DOI:10.1002/anie.202202364
日期:2022.6.20
An efficient and stereoselective Co-catalyzed three-component synthesis of allenyl alcohols is reported. This method introduces two C−C σ bonds through C−H bond activation and sequential addition to 1,3-enynes and a wide range of aldehydes. A plausible mechanism and further transformations are disclosed.