Practical synthesis of amides from alkynyl bromides, amines, and water
摘要:
A general and efficient method for the synthesis of a wide range of amides is described here. The reactions were conducted under convenient conditions and provided secondary and tertiary amides in moderate to excellent yields. A variety of amines and substituted alkynyl bromides were used to investigate the scope of the reactions. (C) 2011 Elsevier Ltd. All rights reserved.
Straightforward α-Amino Nitrile Synthesis Through Mo(CO)<sub>6</sub>
-Catalyzed Reductive Functionalization of Carboxamides
作者:Paz Trillo、Tove Slagbrand、Hans Adolfsson
DOI:10.1002/anie.201807735
日期:2018.9.17
the hemiaminal with a cyanide source, allows for the straightforwardsynthesis of α‐amino nitriles. The methodology presented here, displays high levels of chemoselectivity allowing for the reduction of amides in the presence of functional groups such as ketones, imines, aldehydes, and acids, which affords a simple route for the synthesis of α‐amino nitriles with a broad scope of functionalities in high
reductive functionalization of amides to afford 5‐amino substituted 4,5‐dihydroisoxazoles is presented. The reduction of amides generates reactive enamines, which upon the addition of hydroximinoyl chlorides and base undergoes a 1,3‐dipolar cycloaddition reaction that gives access to the desired heterocyclic compounds. The transformation of amides is highly chemoselective and tolerates functional groups
New access to quaternary aminocyclobutanes via nucleophilic addition on cyclobutaniminium salts
作者:Amandine Kolleth、Alexandre Lumbroso、Gamze Tanriver、Saron Catak、Sarah Sulzer-Mossé、Alain De Mesmaeker
DOI:10.1016/j.tetlet.2016.06.097
日期:2016.8
the first [2+2] cycloaddition between a keteniminium salt and an alkene followed by a nucleophilic addition on the in situ generated cyclobuteniminium salts. This one-pot sequence enables the formation of quaternarycenters with high level of stereoselectivity and is largely applicable to the synthesis of highly strained intermediates as well as precursor for spirohydantoïns. Moreover, DFT calculations
Facile synthesis of amides <i>via</i> acceptorless dehydrogenative coupling of aryl epoxides and amines
作者:Yaoyu Liang、Jie Luo、David Milstein
DOI:10.1039/d2sc01959k
日期:——
The synthesis of amides is significant in a wide variety of academic and industrial fields. We report here a new reaction, namely acceptorless dehydrogenative coupling of epoxides and amines to form amides catalyzed by ruthenium pincer complexes. Various aryl epoxides and amines smoothly convert into the desired amides in high yields with the generation of H2 gas as the only byproduct. Control experiments
酰胺的合成在广泛的学术和工业领域具有重要意义。我们在这里报道了一种新的反应,即环氧化物和胺的无受体脱氢偶联形成由钌钳形配合物催化的酰胺。各种芳基环氧化物和胺以高产率顺利转化为所需的酰胺,产生的唯一副产物是 H 2气体。对照实验表明,酰胺的产生比副产物在动力学上更快,这可能是由于金属-配体合作容易激活环氧化物,这一点得到了对钌-烯醇化物的观察的支持。不涉及酒精或游离醛。提出了一种机制,涉及催化剂的双重作用,这是新反应高产率和选择性的原因。