- Clickable coupling of carboxylic acids and amines at room temperature mediated by SO2F2: A significant breakthrough for the construction of amides and peptide linkages
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The construction of amide bonds and peptide linkages is one of the most fundamental transformations in all life processes and organic synthesis. The synthesis of structurally ubiquitous amide motifs is essential in the assembly of numerous important molecules such as peptides, proteins, alkaloids, pharmaceutical agents, polymers, ligands and agrochemicals. A method of SO2F2-mediated direct clickable coupling of carboxylic acids with amines was developed for the synthesis of a broad scope of amides in a simple, mild, highly efficient, robust and practical manner (>110 examples, >90% yields in most cases). The direct click reactions of acids and amines on a gram scale are also demonstrated using an extremely easy work-up and purification process of washing with 1 M aqueous HCl to provide the desired amides in greater than 99% purity and excellent yields.
- Wang, Shi-Meng,Zhao, Chuang,Zhang, Xu,Qin, Hua-Li
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p. 4087 - 4101
(2019/04/30)
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- COMPOSITONS AND METHODS FOR MODULATING UBA5
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Disclosed herein, inter alia, are compositions and methods useful for inhibiting ubiquitin-like modifier activating enzyme 5.
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Paragraph 0633; 0634; 0636; 0700
(2018/08/26)
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- COMPOSITIONS AND METHODS FOR MODULATING PPP2R1A
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Disclosed herein, inter alia, are compositions and methods useful for modulating PPP2R1 A and for the treatment of cancer.
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Paragraph 0599; 0600; 0607; 0678
(2018/08/26)
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- COMPOSITIONS AND METHODS FOR INHIBITING RETICULON 4
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Disclosed herein, inter alia, are compositions and methods useful for inhibiting reticulon 4(RTN4).
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Paragraph 0645; 0647; 0714
(2018/08/26)
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- Chemoproteomics-enabled covalent ligand screen reveals a cysteine hotspot in reticulon 4 that impairs ER morphology and cancer pathogenicity
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Chemical genetics has arisen as a powerful approach for identifying novel anti-cancer agents. However, a major bottleneck of this approach is identifying the targets of lead compounds that arise from screens. Here, we coupled the synthesis and screening of fragment-based cysteine-reactive covalent ligands with activity-based protein profiling (ABPP) chemoproteomic approaches to identify compounds that impair colorectal cancer pathogenicity and map the druggable hotspots targeted by these hits. Through this coupled approach, we discovered a cysteine-reactive acrylamide DKM 3-30 that significantly impaired colorectal cancer cell pathogenicity through targeting C1101 on reticulon 4 (RTN4). While little is known about the role of RTN4 in colorectal cancer, this protein has been established as a critical mediator of endoplasmic reticulum tubular network formation. We show here that covalent modification of C1101 on RTN4 by DKM 3-30 or genetic knockdown of RTN4 impairs endoplasmic reticulum and nuclear envelope morphology as well as colorectal cancer pathogenicity. We thus put forth RTN4 as a potential novel colorectal cancer therapeutic target and reveal a unique druggable hotspot within RTN4 that can be targeted by covalent ligands to impair colorectal cancer pathogenicity. Our results underscore the utility of coupling the screening of fragment-based covalent ligands with isoTOP-ABPP platforms for mining the proteome for novel druggable nodes that can be targeted for cancer therapy.
- Bateman,Nguyen,Roberts,Miyamoto,Ku,Huffman,Petri,Heslin,Contreras,Skibola,Olzmann,Nomura
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supporting information
p. 7234 - 7237
(2017/07/11)
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- Method for preparing amide from aryl methane derivative and nitrile
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The invention provides a simple and efficient method for directly preparing an amide compound from an aryl methane derivative and nitrile. In the method, manganese triacetate dihydrate is used as a catalyst, and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone(DDQ) is used as an oxidizing agent. The method has the characteristics that raw materials are cheap and easy to obtain, the source of the nitrile is wide, reaction conditions are mild, the applicability is wide and the like. The method solves the problems that ceric ammonium nitrate (CAN) and a fluorine agent which are used by a method for directly synthesizing amide by using aryl methane and nitrile compounds are hard to treat, atomic economy is poor, the source of the nitrile is narrow and the like.
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Paragraph 0071-0073
(2017/05/10)
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- Manganese(III) acetate catalyzed oxidative amination of benzylic C(sp3)-H bonds with nitriles
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Mn-Catalyzed oxidative amination of benzylic C(sp3)-H bonds with nitriles is disclosed, which enables the synthesis of a broad range of secondary amides in moderate to excellent yields under mild conditions. The interaction between Mn(iii) and DDQ facilitates the oxidation and makes it highly efficient and selective.
- Zhang, Yaxing,Dong, Jianyu,Liu, Lixin,Liu, Long,Zhou, Yongbo,Yin, Shuang-Feng
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supporting information
p. 2897 - 2901
(2017/04/11)
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- Microwave assisted, Ca(II)-catalyzed Ritter reaction for the green synthesis of amides
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An efficient solvent-free synthesis of amides by Ca(II) catalyzed Ritter reaction has been reported under microwave irradiation. This green protocol tolerates the substrate diversity and delivers the high yielding amides with minimal loading of inexpensive and more abundant Ca(II) catalyst.
- Yaragorla, Srinivasarao,Singh, Garima,Lal Saini, Pyare,Reddy, M. Kesava
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p. 4657 - 4660
(2014/12/10)
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- Application of SiO2-Pr-SO3H as an efficient catalyst in the Ritter reaction
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Sulfonic-acid-functionalized silica was applied as an efficient heterogeneous acid catalyst in the Ritter reaction to prepare amides by reaction of various benzylic, allylic, and tertiary alcohols with various nitriles in good to excellent yields under solvent-free conditions. The simplicity of the reaction, recovery of catalyst without loss of reactivity, high yield of products, and short reaction time represent improvements over many existing methods.
- Mohammadi Ziarani, Ghodsi,Badiei, Alireza,Dashtianeh, Zeinab,Gholamzadeh, Parisa,Mohtasham, Nina Hosseini
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p. 3157 - 3163
(2013/09/23)
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- KAl(SO4)2.12H2O as an eco-friendly and reusable catalyst for the synthesis of amides by the Ritter reaction
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KAl(SO4)2.12H2O (Alum) is an eco-friendly, inexpensive, readily available and reusable and was applied as catalyst to the synthesis of N-alkyl amides from nitriles and alcohols by the Ritter reaction. This solvent-free procedure is very simple with excellent yields and easy work-up.
- Sadeghi, Bahareh,Farahzadi, Ebrahim,Hassanabadi, Alireza
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p. 539 - 540
(2012/10/30)
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- Organocatalytic synthesis of amides from nitriles via the Ritter reaction
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A simple, inexpensive, environmentally friendly, and efficient route for the synthesis of a wide variety of amides in high yields via the Ritter reaction of alcohols with nitriles has been demonstrated. Pentafluorophenyl ammonium triflate (PFPAT) is used as an organocatalyst and is air-stable, cost-effective, easy to handle, and easily removed from the reaction mixtures.
- Khaksar, Samad,Fattahi, Eskandar,Fattahi, Esmail
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experimental part
p. 5943 - 5946
(2011/11/28)
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- Amberlyst-15 in ionic liquid: An efficient and recyclable reagent for nucleophilic substitution of alcohols and hydroamination of alkenes
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The nucleophilic substitution reaction of secondary alcohols and hydroamination of alkenes with amides, sulfonamides, carbamates, and amines using Amberlyst-15 immobilized in [Bmim][BF4] (1-butyl-3- methylimidazolium tetrafluoroborate) ionic liquid as an efficient recyclable reagent is described. The solvent effect is prominent in the reaction, and the desired substitution products are obtained in good to excellent yield. The protocol is advantageous due to the ease of handling of the reagents, the simple work-up procedure, and the environmentally benign conditions that allow effective recyclability. A facile protocol involving Amberlyst-15 in the ionic liquid [Bmim][BF4] (= 1-butyl-3-methylimidazolium tetrafluoroborate) has been developed for nucleophilic substitution of alcohols and hydroamination of alkenes.
- Qureshi, Ziyauddin S.,Deshmukh, Krishna M.,Tambade, Pawan J.,Dhake, Kishor P.,Bhanage, Bhalchandra M.
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experimental part
p. 6233 - 6238
(2010/12/25)
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- HBF4·OEt2 as a mild and versatile reagent for the Ritter amidation of olefins: A facile synthesis of secondary amides
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A variety of alkenes undergo smooth amidation with nitriles in the presence of HBF4·OEt2 at room temperature under mild conditions to afford the corresponding secondary amides in good to excellent yields. This is a highly efficient method for the preparation of α-aryl ethyl amides especially from vinyl arenes without any side reactions such as olefin polymerization. The use of readily available and easy to handle reagent HBF4·OEt2 makes this method simple, convenient, and practical.
- Subba Reddy,Sivasankar Reddy,Madan, Ch.,Yadav
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experimental part
p. 4827 - 4829
(2010/10/02)
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- The Ritter reaction under incredibly green protocol: Nano magnetically silica-supported Br?nsted acid catalyst
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HClO4-functionalized silica-coated magnetic nanoparticles [γ-Fe2O3@SiO2-HClO4] (2.5 mol%) has been found to be a capable biocompatible and recyclable catalyst for highly efficient conversion of a variety of alcohols to corresponding amides via modified Ritter reaction in good to excellent yields. Since this heterogeneous catalyst can be simply removed by using an external magnetic device then recovered, it also enhances product purity and promises economic.
- Ma'mani, Leila,Heydari, Akbar,Sheykhan, Mehdi
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experimental part
p. 122 - 127
(2010/11/04)
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- FeCl3-catalyzed Ritter reaction. Synthesis of amides
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A safe and inexpensive synthesis of amides, from benzylic alcohols and nitriles and from t-butyl acetate and nitriles, using a Ritter reaction catalyzed by FeCl3·6H2O is described.
- Anxionnat, Bruno,Guérinot, Amandine,Reymond, Sébastien,Cossy, Janine
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experimental part
p. 3470 - 3473
(2009/09/28)
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