25116-00-1Relevant academic research and scientific papers
KOtBu-Promoted Transition-Metal-Free Transamidation of Primary and Tertiary Amides with Amines
Ghosh, Tridev,Jana, Snehasish,Dash, Jyotirmayee
supporting information, p. 6690 - 6694 (2019/09/12)
This work discloses transamidation of primary and tertiary amides with a range of aryl, heteroaryl, and aliphatic amines using potassium tert-butoxide. The reaction proceeds at room temperature under transition-metal-free conditions providing secondary amides in high yields. Moreover, reaction of cyclopropyl amine with tertiary amides proceeds with ring-opening to provide a rapid access to enamides.
Nitrile Hydration Reaction Using Copper Iodide/Cesium Carbonate/DBU in Nitromethane-Water
Kuwabara, Jun,Sawada, Yoshiharu,Yoshimatsu, Mitsuhiro
supporting information, p. 2061 - 2065 (2018/09/14)
The catalytic nitrile hydration (amide formation) in a copper iodide/cesium carbonate/1,8-diazabicyclo[5.4.0]undec-7-ene/nitromethane-water system is described. The protocol is robust and reliable; it can be applied to a broad range of substrates with high chemoselectivity.
Pd-Catalyzed tandem reaction of N-(2-cyanoaryl)benzamides with arylboronic acids: synthesis of quinazolines
Zhu, Jianghe,Shao, Yinlin,Hu, Kun,Qi, Linjun,Cheng, Tianxing,Chen, Jiuxi
supporting information, p. 8596 - 8603 (2018/11/27)
The synthesis of 2,4-disubstituted quinazolines by a palladium-catalyzed reaction of arylboronic acids with N-(2-cyanoaryl)benzamides has been developed with moderate to excellent yields. The method shows good functional group tolerance. In particular, ha
9-Deazapurines as Broad-Spectrum Inhibitors of the ABC Transport Proteins P-Glycoprotein, Multidrug Resistance-Associated Protein 1, and Breast Cancer Resistance Protein
Stefan, Katja,Schmitt, Sven Marcel,Wiese, Michael
, p. 8758 - 8780 (2017/11/15)
P-Glycoprotein (P-gp, ABCB1), multidrug resistance-associated protein 1 (MRP1, ABCC1), and breast cancer resistance protein (BCRP, ABCG2) are the three major ABC transport proteins conferring resistance to many structurally diverse anticancer agents, lead
Synthesis of 2-methylbenzoxazoles directly from: N -phenylacetamides catalyzed by palladium acetate
Wang, Biying,Jiang, Chengfei,Qian, Jiasheng,Zhang, Shuwei,Jia, Xiaodong,Yuan, Yu
, p. 101 - 107 (2017/12/27)
A method to synthesize 2-methylbenzoxazoles directly from N-phenylacetamides catalyzed by Pd(OAc)2 in the presence of K2S2O8 and TfOH has been developed. The desired products were obtained in moderate to excellent yields. This approach provides a facile procedure to prepare benzoxazoles with available substrates. It is found that TfOH is the key factor for this cyclization reaction. A plausible mechanism of the reaction is proposed according to the control reactions and the literature.
Palladium-Catalyzed Regioselective Direct Cyanation of Acetanilide Derivatives with K4[Fe(CN)6] by C–H Bond Activation
Kianmehr, Ebrahim,Faghih, Nasser,Tanbakouchian, Arezoo,Mahdavi, Mohammad
, p. 4269 - 4274 (2016/09/14)
A practical, versatile, and efficient method for the palladium-catalyzed direct cyanation of readily available acetanilides with K4[Fe(CN)6] as a safe cyanating agent through C–H bond activation with excellent C2 regioselectivity was developed. This finding represents a new strategy for the synthesis of N-(2-cyanoaryl)acetamides, which are important structural motifs in natural products and pharmaceuticals.
Copper-catalyzed oxidative ring closure of ortho-cyanoanilides with hypervalent iodonium salts: Arylation-ring closure approach to iminobenzoxazines
Aradi, Klra,Novk, Zoltn
supporting information, p. 371 - 376 (2015/03/05)
A novel, highly modular synthetic methodology with high functional group tolerance was developed for the construction of iminobenzoxazine derivatives from ortho-cyanoanilides and diaryliodonium triflates via an oxidative arylation-cyclization path. The reaction is supposed to involve the formation of highly active aryl-copper(III) species. In this novel transformation, copper(II) triflate was used as catalyst in 1,2-dichloroethane or ethyl acetate and the reaction takes place at 75 °C in 2-16 h.
The reaction of 2-(acylamino)benzonitriles with primary aromatic amines: A convenient synthesis of 2-substituted 4-(arylamino)quinazolines
Marinho, Elina,Proen?a, M. Fernanda
supporting information, p. 1623 - 1632 (2015/03/30)
Abstract 2-Substituted 4-(arylamino)quinazolines were prepared from 2-(acylamino)benzonitriles and primary arylamines by refluxing in either ethanol using trifluoroacetic acid as a catalyst or acetic acid. The 2-aminobenzonitrile was acylated by reaction with anhydrides, isocyanates, or ethyl chloroformate at room temperature.
Convenient N-acetylation of amines in N,N-dimethylacetamide with N,N-carbonyldiimidazole
Chikkulapalli, Anil,Aavula, Sanjeev Kumar,Mona Np, Rifahath,Karthikeyan, Karthikeyan,Kumar C.H., Vinodh,Sulur G., Manjunatha,Sumathi, Shanmugam
supporting information, p. 3799 - 3803 (2015/06/08)
Dimethylacetamide (DMAc) acts as an efficient source of acetyl and dimethylamine gas in the presence of N,N-carbonyldiimidazole (CDI). Addition of amines to the reaction mixture delivers the corresponding amides in good to excellent yields. The acetylation of amines reported herein, which relies on the in situ generation of N-acetylimidazole on warming of DMAc with CDI at 120-125 °C, serves as a convenient alternative to other acetylation methods.
Preparation and characterization of multi-walled carbon nanotubes (MWCNTs), functionalized with phosphonic acid (MWCNTs-C-PO3H2) and its application as a novel, efficient, heterogeneous, highly selective and reusable catalyst for acetylation of alcohols, phenols, aromatic amines, and thiols
Dehghani, Farzaneh,Sardarian, Ali Reza,Doroodmand, Mohammad Mehdi
, p. 673 - 684 (2014/05/20)
A novel, efficient, heterogeneous, and reusable multi-walled carbon nanotubes (MWCNTs), functionalized with phosphonic acid (MWCNTs-C-PO 3H2) has been synthesized. The synthesized CNTs were characterized using some electron microscopic techniques such as scanning electron microscopy (SEM), atomic force microscopy (AFM), Energy dispersive X-ray spectroscopy (EDAX), and also some thermal and spectroscopic methods such as thermogravimetry (TG). The nitrogen adsorption behavior of the MWCNTs-C-PO3H2 catalyst was evaluated using the TG instrumentation system at 25°C. The catalyst was applied successfully for highly efficient and selective acetylation of alcohols, phenols, thiols and aromatic amines with acetic anhydride at room temperature under solvent-free conditions. The reusability of the catalyst was checked and the recovered catalyst was reused for five runs without significant loss in activity.
