Generation of gold carbenes in water: efficient intermolecular trapping of the α-oxo gold carbenoids by indoles and anilines
作者:Long Li、Chao Shu、Bo Zhou、Yong-Fei Yu、Xin-Yu Xiao、Long-Wu Ye
DOI:10.1039/c4sc00983e
日期:——
efficient intermolecular reaction of gold carbene intermediates, generated via gold-catalyzedalkyneoxidation, with indoles and anilines has been realized in aqueous media. Importantly, it was revealed for the first time that water could dramatically suppress the undesired over-oxidation, providing a general and practical solution to the problem of over-oxidation in gold-catalyzedintermolecular alkyne
A novel arylation of sulfonamides with boronic acids to afford numerous diaryl sulfones via a visible light-mediated N–S bond cleavage other than the typical transition-metal-catalyzed C(O)–N bond activation is described. This methodology, which represents the first catalyst-free protocol for the sulfonylation of boronic acids, is characterized by its simple reaction conditions, good functional group
Regioselective TfOH-mediated hydroamidation of ynamides with nitriles
作者:Wan-Shu Wang、Ping Chen、Yu Tang
DOI:10.1016/j.tet.2017.03.060
日期:2017.5
A new TfOH-mediated reaction of ynamides with nitriles as nucleophiles has been developed. The reaction works efficiently under mild reaction conditions to afford a new class of alpha-acylaminoenamides readily via the intermediacy of keteniminium ion. The reaction displays generality and a broad substrates scope. Additionally, the alpha-acylaminoenamides could be transformed to highly substituted pyridine, 4-aminopyrimidine or isoquinoline cores. (C) 2017 Elsevier Ltd. All rights reserved.
TMSOTf-Catalyzed Reactions of <i>N</i>-Arylynamides with Sulfilimines To Construct 2-Aminoindoles and α-Arylated Amidines
METHOD FOR PREPARING PRIMARY AMIDE COMPOUNDS FROM SECONDARY OR TERTIARY AMIDES
申请人:INDUSTRY FOUNDATION OF CHONNAM NATIONAL UNIVERSITY
公开号:US20230234913A1
公开(公告)日:2023-07-27
The present invention relates to a method for preparing primary amides from tertiary or secondary amides substituted with various alkyl groups through a transamidation reaction without a metal catalyst in room-temperature conditions by adding ammonium carbonate ((NH
4
)
2
CO
3
), wherein the method is eco-friendly since various secondary and tertiary amides that are not toxic or corrosive are used as starting materials and ammonium carbonate ((NH
4
)
2
CO
3
) that is neither a strong acid nor a strong base is used, and the method is economical since various primary amides can be synthesized with an excellent yield at room temperature without a metal catalyst.