Preparation of <i>N</i>-Alkyl 2-Pyridones via a Lithium Iodide Promoted <i>O</i>- to <i>N</i>-Alkyl Migration: Scope and Mechanism
作者:Sarah Z. Tasker、Michael A. Bosscher、Christina A. Shandro、Erica L. Lanni、Keun Ah Ryu、Gregory S. Snapper、Jarrad M. Utter、Bruce A. Ellsworth、Carolyn E. Anderson
DOI:10.1021/jo3015424
日期:2012.9.21
An efficient and inexpensive LiI-promoted O- to N-alkyl migration of 2-benzyloxy-, 2-allyloxy-, and 2-propargyloxypyridines and heterocycles is reported. The reaction produces the corresponding N-alkyl 2-pyridones and analogues under green, solvent-free conditions in good to excellent yields (30 examples, 20–97% yield). This method has been shown to be intermolecular and requires heat and lithium cation
Au(III)-Catalyzed Tandem Amination–Hydration of Alkynes: Synthesis of α-(<i>N</i>-2-Pyridonyl)ketones
作者:Nathan A. Romero、Benjamin M. Klepser、Carolyn E. Anderson
DOI:10.1021/ol203398e
日期:2012.2.3
reaction has been discovered, leading to the formation of α-(N-2-pyridonyl)ketones and heterocyclic analogues in good to excellent yields (14 examples, 48–90%). This reaction demonstrates the unusual use of a heterocyclic sp2 nitrogen nucleophile in a gold-catalyzed 6-endo-dig cyclization. The tandem process allows rapid access to α-(N-2-pyridonyl)ketones, making them a convenient building block for the synthesis
已经发现了一种新的Au(III)催化的串联胺化-水合反应,导致形成α-(N -2-吡啶基)酮和杂环类似物,产率高至优异(14例,48-90%)。该反应表明杂环sp 2氮亲核试剂在金催化的6- end - dig环化反应中的异常使用。串联过程允许快速获得α-(N -2-吡啶基)酮,这使其成为合成更复杂的N-烷基吡啶酮靶标的便捷组成部分。
Au(I)-Catalyzed Synthesis of Trisubstituted Indolizines from 2-Propargyloxypyridines and Methyl Ketones
作者:Matthew D. Rossler、Colin T. Hartgerink、Emily E. Zerull、Benjamin L. Boss、Abigail K. Frndak、Miles M. Mason、Leslie A. Nickerson、Evan O. Romero、Jaimie E. Van de Burg、Richard J. Staples、Carolyn E. Anderson
DOI:10.1021/acs.orglett.9b01929
日期:2019.7.19
A new Au(I)-catalyzed method for the preparation of trisubstituted indolizines from easily accessible 2-propargyloxy-pyridines is reported. The reaction tolerates a wide range of functionality, allowing for diversity to be introduced in four distinct regions of the product (R, R1, R2, and Ar). The proposed mechanism proceeds via enol addition to an allenamide intermediate and explains the observed
Synthesis of <i>N</i>-Alkenyl 2-Pyridonyl Ethers via a Au(I)-Catalyzed Rearrangement of 2-Propargyloxypyridines
作者:Evan O. Romero、Connor P. Reidy、Andrea N. Bootsma、Noah M. PreFontaine、Nicholas W. Vryhof、David C. Wierenga、Carolyn E. Anderson
DOI:10.1021/acs.joc.6b02075
日期:2016.10.21
2-pyridonyl ethers are formed reversibly in the transformation. After extensive optimization, biaryl Au(I) catalyst 21 was found to overcome the inherentpreference for the 6-endo pathway and provide the highest combination of 5-exo selectivity and yield. Herein, we report the application of this new Au(I)-catalyzed C-N bond formation to the preparation of a variety of N-alkenyl 2-pyridonyl ether analogues
Correction to Synthesis of <i>N</i>-Alkenyl 2-Pyridonyl Ethers via a Au(I)-Catalyzed Rearrangement of 2-Propargyloxypyridines
作者:Evan O. Romero、Connor P. Reidy、Andrea N. Bootsma、Noah M. PreFontaine、Nicholas W. Vryhof、David C. Wierenga、Carolyn E. Anderson
DOI:10.1021/acs.joc.0c00151
日期:2020.3.6
yridonyl)oct-1-ene (26h) 2-(3-Methylbutoxy)-3-(2-pyridonyl)oct-1-ene (8b) 2-(2-Methylpropoxy)-3-(2-pyridonyl)oct-1-ene (8c) 2-Cyclohexoxy-3-(2-pyridonyl)oct-1-ene (8d) Similar errors existed in the Supporting Information. As such, a new version has been provided. This updated version also contains additional 2D NMR evidence in support of the revised structure of compounds 8/26. The Supporting Information