Three-component coupling reactions of propargyl halides, amines, and organic halides in the presence of palladium–copper catalysis produced efficiently highly functionalizedpropargylic amines in good to excellent yields at room temperature. Extension to the synthesis of 2-(dialkylaminomethyl)benzo[b]furan or indole derivatives is described.
炔丙基卤,胺和有机卤化物在钯-铜催化下的三组分偶联反应可在室温下高效高效地官能化炔丙基胺,并具有良好或优异的收率。描述了2-(二烷基氨基甲基)苯并[ b ]呋喃或吲哚衍生物的合成的扩展。
Three-component one-pot process to propargylic amines and related amide and sulfonamide compounds: application to the construction of 2-(aminomethyl)benzofurans and indoles
wide variety of tertiarypropargylic amines were synthesized in good to excellent yields from easily accessible starting materials. This three-component assembling was also effective when using potassium phthalimide or di-tert-butyliminodicarbonate instead of secondary amines. Consequently, it provides a quick entry to N-protected propargylic amines suitable intermediates for the synthesis of primary and
描述了一种高效的钯铜催化的炔丙基卤化物,芳基或杂芳基卤化物和仲胺的三组分组装。从易于获得的起始原料中,以高至优异的产率合成了多种叔炔丙基胺。当使用邻苯二甲酰亚胺钾或叔丁基亚氨基二碳酸酯代替仲胺时,这种三组分组装也是有效的。因此,它可以快速进入N-保护的炔丙基胺是合成伯和仲炔丙基胺的合适的中间体。以类似的方式,有效地获得了包括炔丙基酰胺,氨基甲酸酯和磺酰胺衍生物的相关化合物。该催化多米诺三组分工艺已成功地用于构建具有生物学意义的功能化2-(氨基甲基)苯并[ b ]呋喃或吲哚衍生物。
Synthesis of Allenes via Palladium-Catalyzed Hydrogen-Transfer Reactions: Propargylic Amines as an Allenyl Anion Equivalent
作者:Hiroyuki Nakamura、Takaya Kamakura、Makoto Ishikura、Jean- François Biellmann
DOI:10.1021/ja039175+
日期:2004.5.1
Synthesis of allenes has been achieved by using palladium-catalyzed hydrogen-transfer reactions. Various propargylic amines, which were readily prepapred from iodobenzenes and propargylic amines by Sonogashira coupling reaction, underwent the hydrogen-transfer reaction in the presence of Pd2dba3.CHCl3/(C6F5)3P catalyst at 100 degrees C in dioxane for 24 h, giving the corresponding allenes in 43-99%
Mono- and 1,3-disubstituted allenes were synthesized from the corresponding propargylamines via palladium-catalysed hydride-transferreaction. In the current transformation, propargylic amines can be handled as allenyl anion equivalents and introduced into various electrophiles to be transformed into allenes under palladium-catalyzed conditions.
Phosphine-Catalyzed Allylic Alkylation of (Hetero)Aryl Alkynes with Pronucleophiles: Concise Total Synthesis of (±)-Esermethole
作者:Ningtao He、Jilong Zhang、Xiaohe Miao、Dehai Li、De Wang
DOI:10.1021/acs.orglett.3c02275
日期:2023.8.25
Allylic alkylations are valuable in the construction of versatile carbon–carbon bonds, which are mostly catalyzed by noble transition metals with additional waste byproductgeneration. Here, we present the first organophosphine-catalyzed allylic alkylation of (hetero)aryl alkynes with various carbo-nucleophiles. The methodology is highly atom economical and compatible with a wide substrate scope (more