通过 Csp-Csp2 键裂解将炔烃与硝基化合物氮化以制备功能化 [1,4]Oxazinones

IF 5 1区化学 Q1 CHEMISTRY, ORGANIC

Organic Letters Pub Date : 2024-10-25 DOI:10.1021/acs.orglett.4c0355310.1021/acs.orglett.4c03553

Yu Zhao, Li-Bing Yan, Lin-Fen Liao, Gui-Qing Wu, Xin-Xian Zhong*, Cui Liang, Chun-Hua Chen* and Dong-Liang Mo*,

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引用次数: 0

摘要

在此，我们报告了一种新策略，即通过超价碘(III)化合物介导的炔类化合物选择性 Csp-Csp2 键裂解和硝基化合物的 C═N/N-O 键裂解以及 C-C/C-O/C-N 多键重组，以良好的产率和高非对映选择性获得各种带有邻碳立体中心的官能化 [1,4]oxazinones。机理研究表明，该反应在一个烧瓶中经历了多米诺[4 + 3]环加成、N-O 键的 1,3 重排、分子内环化、脱芳基化和重芳基化四个步骤。该方法具有良好的官能团耐受性、广泛的底物范围、C-C/C═N/N-O 多键裂解和重组等特点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Nitrogenation of Alkynes with Nitrones to Prepare Functionalized [1,4]Oxazinones through Csp–Csp2 Bond Cleavage

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Nitrogenation of Alkynes with Nitrones to Prepare Functionalized [1,4]Oxazinones through Csp–Csp2 Bond Cleavage

Herein, we report a novel strategy of hypervalent iodine(III) compound-mediated selective C_sp–C_sp² bond cleavage of alkynes and C═N/N–O bond cleavage of nitrones and recombination of C–C/C–O/C–N multiple bonds to access various functionalized [1,4]oxazinones bearing a vicinal carbon stereocenter in good yields and high diastereoselectivity. Mechanistic studies revealed that the reaction undergoes a domino [4 + 3] cycloaddition, 1,3-rearrangement of N–O bond, intramolecular cyclization, dearomatization, and rearomatization over four steps in a single flask. The present method features good functional group tolerance, broad substrate scope, and C–C/C═N/N–O multiple bonds cleavage and recombination.

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来源期刊

Organic Letters 化学-有机化学

CiteScore

9.30

自引率

11.50%

发文量

1607

审稿时长

1.5 months

期刊介绍： Organic Letters invites original reports of fundamental research in all branches of the theory and practice of organic, physical organic, organometallic,medicinal, and bioorganic chemistry. Organic Letters provides rapid disclosure of the key elements of significant studies that are of interest to a large portion of the organic community. In selecting manuscripts for publication, the Editors place emphasis on the originality, quality and wide interest of the work. Authors should provide enough background information to place the new disclosure in context and to justify the rapid publication format. Back-to-back Letters will be considered. Full details should be reserved for an Article, which should appear in due course.