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Gold(I)-Catalyzed Allylation and Tandem Allylation–Cycloisomerization of Stannylated Propargyl Acetates with Allylsilanes
European Journal of Organic Chemistry ( IF 2.7 ) Pub Date : 2025-04-03 , DOI: 10.1002/ejoc.202500253
Nene Murata Sota Akima Syed R. Hussaini Yoshikazu Horino

Bicyclo[3.1.0]hex-2-enes, synthesized by the cycloisomerization of 1,5-enynes, serve as key scaffolds in various natural products. Gold(I)-catalyzed cycloisomerization of 1,5-enynes is an efficient route to bicyclo[3.1.0]hex-2-enes. However, gold(I)-catalyzed 1,5-enyne synthesis, particularly with a terminal alkyne, has not yet been fully explored. This study presents a mild and general method for the gold(I)-catalyzed allylation and tandem allylation–cycloisomerization of stannylated propargyl acetates with allylsilanes, yielding 1,5-enynes with terminal alkyne moiety and bicyclo[3.1.0]hex-2-enes. The catalytic system ((4-MeOC6H4)3PAuCl/AgSbF6) enabled the efficient synthesis of 1,5-enynes with good to high yields and regioselectivities. In addition, gold(I)-catalyzed tandem allylation–cycloisomerization using (JohnPhos)Au(MeCN)SbF6 afforded bicyclo[3.1.0]hex-2-enes with high regiocontrol. Stannylated propargyl acetates proved crucial in enhancing selectivity for both product classes.

中文翻译:

金(I) 催化的烯丙基化和串联烯丙基化 - 用烯丙基硅烷对乙酰化丙炔乙酸酯的环异构化

由 1,5-烯烃的环异构化合成的双环[3.1.0]己-2-烯,在各种天然产物中用作关键支架。金 (I) 催化的 1,5-烯烃环异构化是获得双环[3.1.0]己-2-烯的有效途径。然而,金 (I) 催化的 1,5-烯炔合成,特别是与末端炔烃的合成,尚未得到充分探索。本研究提出了一种温和的通用方法,用于亚锡化炔丙基乙酸酯与烯丙基硅烷的金(I)催化烯丙基化和串联烯丙基化-环异构化,产生具有末端炔烃部分的 1,5-烯烃和双环[3.1.0]己-2-烯。催化系统 ((4-MeOC6H43PAuCl/AgSbF6) 能够高效合成 1,5-烯烃,具有良好至高的产率和区域选择性。此外,使用 (JohnPhos)Au(MeCN)SbF6 的金 (I) 催化的串联烯丙基化 - 环异构化得到了具有高区域控制的双环 [3.1.0]hex-2-enes。事实证明,苯二甲酸丙炔酯在提高这两类产品的选择性方面都至关重要。
更新日期:2025-04-03
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