Transamidation for the Synthesis of Primary Amides at Room Temperature
作者:Jiajia Chen、Yuanzhi Xia、Sunwoo Lee
DOI:10.1021/acs.orglett.0c00958
日期:2020.5.1
Various primary amides have been synthesized using the transamidation of various tertiary amides under metal-free and mild reaction conditions. When (NH4)2CO3 reacts with a tertiary amide bearing an N-electron-withdrawing substituent, such as sulfonyl and diacyl, in DMSO at 25 °C, the desired primary amide product is formed in good yield with good funcctional group tolerance. In addition, N-tosylated
Efficient and Mild Ullmann-Type N-Arylation of Amides, Carbamates, and Azoles in Water
作者:Maud Bollenbach、Pedro G. V. Aquino、João Xavier de Araújo-Júnior、Jean-Jacques Bourguignon、Frédéric Bihel、Christophe Salomé、Patrick Wagner、Martine Schmitt
DOI:10.1002/chem.201700832
日期:2017.10.4
A simple, sustainable, efficient, mild, and low‐cost protocol was developed for d‐glucose‐assisted Cu‐catalyzed Ullmann reactions in water for amides, carbamates, and nitrogen‐containing heterocycles. The reaction was compatible with diverse aryl/heteroaryl iodides, giving highly substituted pyridine, indole, or indazole rings. This method offers an attractive alternative to existing protocols, because
Rh(III)-Catalyzed Redox-Neutral Annulation of Primary Benzamides with Diazo Compounds: Approach to Isoquinolinones
作者:Youzhi Wu、Peng Sun、Kaifan Zhang、Tie Yang、Hequan Yao、Aijun Lin
DOI:10.1021/acs.joc.5b02824
日期:2016.3.4
Reported herein is a Rh-catalyzed redox-neutralannulation of primary benzamides with diazo compounds, representing an efficient and economic protocol to isoquinolinones. The procedure exhibited good functional group tolerability, scalability, and regioselectivity, obviating the need for oxidants, and only environmentally benign N2 and H2O were released. Further utilization of the method provided an
Acid cleavable compounds, their preparation and use as bifunctional
申请人:The Dow Chemical Company
公开号:US05505931A1
公开(公告)日:1996-04-09
Novel compounds, their preparation and their use as bifunctional acid-labile crosslinking agents which are cleavable in an acid environment at a pH of below about 5.0 allowing for the controlled release of nucleophilic groups attached thereto are disclosed.
Ruthenium-catalyzed one-pot synthesis of primary amides from aldehydes in water
作者:Rocío García-Álvarez、Alba E. Díaz-Álvarez、Pascale Crochet、Victorio Cadierno
DOI:10.1039/c3ra23195j
日期:——
an efficient catalyst for the direct synthesis of primaryamidesfromaldehydes and hydroxylamine hydrochloride (NH2OH·HCl) in water at 100 °C. The process, which requires the presence of NaHCO3 to catch the HCl released during the formation of the key aldoxime intermediates, was operative with both aromatic, heteroaromatic, α,β-unsaturated and aliphatic aldehydes, and tolerated several functional groups