ortho-Carbonylarylacetylenols have been employed for the synthesis of dihydronaphthofurans via AgTFA-catalyzed annulation reaction. A broad range of substrates both ortho-keto- and ortho-formylarylacetylenols could be employed in this transformation providing the desired products in good yields. However, the reaction pathways of these two substrates are different. The reaction of the ketone precursors could directly
Electrophilic Cyclization and Intermolecular Acetalation of 2-(4-Hydroxybut-1-yn-1-yl)benzaldehydes: Synthesis of Diiodinated Diepoxydibenzo[<i>c</i>,<i>k</i>][1,9]dioxacyclohexadecines
strategy for the preparation of diiodinated diepoxydibenzo[c,k][1,9]dioxacyclohexadecines from readily available 2-(4-hydroxybut-1-yn-1-yl)benzaldehydes through electrophile-triggered tandem cyclization/intermolecular acetalation sequence has been presented. The electrophilic macrocyclization can be performed under mild conditions and in up to gram quantities. Moreover, palladium-catalyzed coupling and
Gold-Catalyzed Cascade Annulations of 2-(Ynol)aryl Aldehydes: Facile Synthesis of Benzochromanes and Benzobicyclo[<i>n</i>.3.1]acetals
作者:Le-Ping Liu、Gerald B. Hammond
DOI:10.1021/ol101985d
日期:2010.10.15
Gold-catalyzed reactions of 2-(ynol)aryl aldehydes were investigated. Benzochromanes were obtained from the reaction when AuCl3 was employed as the catalyst, whereas benzobicyclo[n.3.1]acetals were produced when triazole−gold was employed as the catalyst. Plausible mechanisms are discussed.
研究了金催化的2-(ynol)芳基醛的反应。当使用AuCl 3作为催化剂时,从反应中获得苯并二氢吡喃,而当使用三唑-金作为催化剂时,则生成苯并双环[ n .3.1]缩醛。讨论了可能的机制。
This invention covers quinolinyl substituted phenyl/thioalkanoic acid substituted propionic acids leukotriene inhibitors having the following general formula ##STR1## where the substituents are defined herein.
Divergent Synthesis of Sulfonyl Quinolines, Formyl Indoles, and Quinolones from Ethynyl Benzoxazinanones via Au<sup>I</sup> Catalysis, Au<sup>I</sup>-ArI Co-Catalysis, and Silver Catalysis
作者:Guifang Chen、Bo Xu
DOI:10.1021/acscatal.2c02018
日期:2022.6.17
transition metal catalysts. Our proof of concept application is the divergent synthesis of sulfonyl quinolines, formyl indoles, and quinolones from ethynyl benzoxazinanones via AuI catalysis, AuI-ArI co-catalysis, and silvercatalysis. The chemo- and regioselectivity are good, and all the reactions can be conducted in the open air.
Au I与芳族碘化物 (Ar-I)的氧化加成可以原位生成反应性但耐受官能团的 Au III催化剂 (Ar-Au III -I)。与 Au I催化剂和其他过渡金属催化剂相比,Ar-Au III -I 可能表现出不同的反应性。我们的概念应用证明是通过 Au I催化、Au I -ArI 共催化和银催化从乙炔基苯并恶嗪酮类中发散合成磺酰基喹啉、甲酰基吲哚和喹诺酮类药物。化学选择性和区域选择性好,所有反应均可在露天进行。