Rapid Construction of Tetralin, Chromane, and Indane Motifs via Cyclative C–H/C–H Coupling: Four-Step Total Synthesis of (±)-Russujaponol F
作者:Zhe Zhuang、Alastair N. Herron、Shuang Liu、Jin-Quan Yu
DOI:10.1021/jacs.0c12484
日期:2021.1.20
important scaffolds, including tetralins, chromanes, and indanes, can be easily prepared by this protocol. Finally, the synthetic application of this methodology is demonstrated by the concise totalsynthesis of (±)-russujaponol F in a four-step sequence starting from readily available phenylacetic acid and pivalic acid through sequential functionalizations of four C-H bonds.
实际的 CH/CH 偶联反应的开发仍然是一项具有挑战性但具有吸引力的合成冒险,因为它避免了对两个偶联伙伴进行预功能化以生成 CC 键的需要。在此,我们报告了由基于环戊烷的单-N-保护的 β-氨基酸配体实现的游离脂肪酸的环化 C(sp3)-H/C(sp2)-H 偶联反应。该反应使用廉价的过碳酸钠 (Na2CO3·1.5H2O2) 作为唯一的氧化剂,并生成水作为唯一的副产物。该协议可以很容易地制备一系列生物学上重要的支架,包括四氢萘、色烷和茚满。最后,
Novel oxidative nitrogen to carbon rearrangement found in the conversion of anilines to benzaldoximes by treating with HCHO/H2O2
作者:Naval Kapuriya、Kalpana Kapuriya、Narsinh M. Dodia、Yi-Wen Lin、Rajesh Kakadiya、Chao-Ting Wu、Ching-Huang Chen、Yogesh Naliapara、Tsann-Long Su
DOI:10.1016/j.tetlet.2008.03.033
日期:2008.4
Novelrearrangement was found by reacting anilines with HCHO/H2O2 resulting in the synthesis of various benzaldoximes. The mechanism of the rearrangement is proposed and suggested that the rearrangement might proceed via unstable N-phenyloxazirane intermediate followed by the transfer of aryl moiety from nitrogen to carbon atom leading to the formation of benzaldoxime.
通过使苯胺与HCHO / H 2 O 2反应,发现了新颖的重排反应,从而合成了各种苯甲醛肟。提出了重排的机理,并提出重排可能通过不稳定的N-苯基恶嗪烷中间体进行,然后芳基部分从氮转移到碳原子,从而导致苯甲醛肟的形成。
Activation Relay on Rhodium-Catalyzed C–H Aminomethylation in Cooperation with Photoredox Catalysis
作者:Ruixing Liu、Jiaxin Liu、Yin Wei、Min Shi
DOI:10.1021/acs.orglett.9b01261
日期:2019.6.7
A site selective C–H aminomethylation at indole’s C3 position has been achieved by merging rhodium(III)-catalyzed C–H activation and photoredox catalysis in a one-pot manner. An investigation of the mechanistic insights rationalized the essence of the activation relay and the combination mode.
Vinylethylene Carbonates as <i>α,β</i>-Unsaturated Aldehyde Surrogates for Regioselective [3 + 3] Cycloaddition
作者:Yi Xu、Lu Chen、Yu-wen Yang、Zhiqiang Zhang、Weibo Yang
DOI:10.1021/acs.orglett.9b02266
日期:2019.9.6
operationally simple [3 + 3] cycloaddition of vinylethylene carbonates with triazinanes. Interestingly, we could also use this method for a [3 + 3] oxidative cycloaddition, which allows the facile synthesis of polysubstituted terphenyls under mild conditions. Mechanistic studies suggest that vinylethylene carbonates could generate α,β-unsaturatedaldehydes as 3-carbon synthons for cycloaddition via a combination
Preparation of spiro[imidazolidine-4,3′-indolin]-2′-imines <i>via</i> copper(<scp>i</scp>)-catalyzed formal [2 + 2 + 1] cycloaddition of 3-diazoindolin-2-imines and triazines
作者:Yuxuan Zhou、Fanghui Ma、Ping Lu、Yanguang Wang
DOI:10.1039/c9ob01767d
日期:——
We report a facile and efficient synthesis of spiro[imidazolidine-4,3′-indolin]-2′-imines via a copper(i)-catalyzed cascade reaction of 3-diazoindolin-2-imines with 1,3,5-triazines.