Phosgene-free and Chemoselective Synthesis of Novel Polyureas from Activated l-Lysine with Diphenyl Carbonate

2020 ◽  
Vol 53 (16) ◽  
pp. 6809-6815
Author(s):  
Daisuke Yakeya ◽  
Yoshiaki Yoshida ◽  
Takeshi Endo
Keyword(s):  
Diphenyl Carbonate ◽  
Chemoselective Synthesis

Chemoselective Synthesis of Aminobenzylic Derivative of Mackinazolinone and its X-ray Investigations

2019 ◽  
Vol 9 (3) ◽  
pp. 109-114
Author(s):  
Nuritdinova R. R. ◽  
Elmuradov B. Zh. ◽  
Okmanov R. Ya. ◽  
Zakhidov K. A. ◽  
Tadjimukhamedov Kh.S.
Keyword(s):  
X Ray ◽  
Chemoselective Synthesis

Copper Catalysts in the Synthesis of Five-membered N-polyheterocycles

2018 ◽  
Vol 15 (7) ◽  
pp. 940-971 ◽  
Author(s):  
Navjeet Kaur
Keyword(s):  
Transition Metal ◽  
Organic Synthesis ◽  
Copper Catalysts ◽  
Research Field ◽  
Chemoselective Synthesis ◽  
Specialized Equipment ◽  
Transition Metal Catalyzed ◽  
Synthetic Methodologies ◽  
Metal Catalyzed ◽  
Traditional Approaches

Background: Due to significant biological activity associated with N-, O- and S-heterocycles, a number of reports for their synthesis have appeared in recent decades. Traditional approaches require expensive or highly specialized equipment or would be of limited use to the synthetic organic chemist due to their highly inconvenient approaches. This review summarizes the applications of copper catalysts with the emphasis on their synthetic applications for nitrogen bearing polyheterocylces. In summary, this review article describes the synthesis of a number of five-membered poly heterocyclic rings. Objective: Nowadays new approaches that employ atom-economical and efficient pathway have been developed. The researchers are following natural models to design and synthesize heterocycles. The transition metal catalyzed protocols have attracted the attention as compared to other synthetic methodologies because they use easily available substrates to build multiple substituted complicated molecules directly under mild conditions. In organic synthesis, constituted by transition metal catalyzed coupling transformations are one of the most powerful and useful protocols. The N-heterocycles are synthesized by this convenient and useful tool. Conclusion: The efficient and chemoselective synthesis of heterocycles by this technique has appeared as an important tool. This review shows a highly dynamic research field and the employment of copper catalysts in organic synthesis. Several strategies have been pointed out in the past few years, to meet more sustainable, efficient and environmentally benign chemical products and procedures. The catalytic strategies have been the focus of intense research because they avoid the use of toxic reagents. Among these catalytic strategies, highly rewarding and an important method in heterocycles synthesis is metal catalyzed synthesis.

HClO4-SiO2 catalyzed chemoselective synthesis of acylals from aldehydes under solvent-free conditions

2006 ◽  
Vol 247 (1-2) ◽  
pp. 27-30 ◽  
Author(s):  
Rishi Kumar ◽  
Pallavi Tiwari ◽  
Prakas Ranjan Maulik ◽  
Anup Kumar Misra
Keyword(s):  
Solvent Free ◽  
Solvent Free Conditions ◽  
Chemoselective Synthesis

ChemInform Abstract: Chemoselective Synthesis of Enamino-Coumarin Derivatives Identified as Potent Antitumor Agents.

ChemInform ◽  
2016 ◽  
Vol 47 (49) ◽  
Author(s):  
Mona E. Ibrahim ◽  
Wafaa S. Hamama ◽  
Asmaa E. Metwalli ◽  
Hanafi H. Zoorob
Keyword(s):  
Antitumor Agents ◽  
Coumarin Derivatives ◽  
Chemoselective Synthesis

Preparation of an improved sulfonated carbon-based solid acid as a novel, efficient, and reusable catalyst for chemoselective synthesis of 2-oxazolines and bis-oxazolines

2009 ◽  
Vol 140 (12) ◽  
pp. 1489-1494 ◽  
Author(s):  
Valiollah Mirkhani ◽  
Majid Moghadam ◽  
Shahram Tangestaninejad ◽  
Iraj Mohammadpoor-Baltork ◽  
Mohammad Mahdavi
Keyword(s):  
Solid Acid ◽  
Reusable Catalyst ◽  
Chemoselective Synthesis ◽  
Carbon Based

Chemoselective synthesis of ethanol via hydrogenation of dimethyl oxalate on Cu/SiO 2 : Enhanced stability with boron dopant

2013 ◽  
Vol 297 ◽  
pp. 142-150 ◽  
Author(s):  
Shuo Zhao ◽  
Hairong Yue ◽  
Yujun Zhao ◽  
Bo Wang ◽  
Yaochen Geng ◽  
...  
Keyword(s):  
Dimethyl Oxalate ◽  
Chemoselective Synthesis ◽  
Boron Dopant ◽  
Enhanced Stability

Mild and Chemoselective Synthesis of Lactones from Diols Using a Novel Metal−Ligand Bifunctional Catalyst

2002 ◽  
Vol 4 (14) ◽  
pp. 2361-2363 ◽  
Author(s):  
Takeyuki Suzuki ◽  
Kenji Morita ◽  
Mika Tsuchida ◽  
Kunio Hiroi
Keyword(s):  
Bifunctional Catalyst ◽  
Chemoselective Synthesis ◽  
Metal Ligand
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