Enantioselective Synthesis of Coumarin Derivatives Catalyzed by Primary Amines

2013 ◽  
Vol 355 (16) ◽  
pp. 3154-3160 ◽  
Author(s):  
Yen-Te Lee ◽  
Utpal Das ◽  
Yi-Ru Chen ◽  
Chia-Jui Lee ◽  
Chi-Han Chen ◽  
...  
Keyword(s):  
Enantioselective Synthesis ◽  
Primary Amines ◽  
Coumarin Derivatives

ChemInform Abstract: Enantioselective Synthesis of Coumarin Derivatives Catalyzed by Primary Amines.

ChemInform ◽  
2014 ◽  
Vol 45 (16) ◽  
pp. no-no
Author(s):  
Yen-Te Lee ◽  
Utpal Das ◽  
Yi-Ru Chen ◽  
Chia-Jui Lee ◽  
Chi-Han Chen ◽  
...  
Keyword(s):  
Enantioselective Synthesis ◽  
Primary Amines ◽  
Coumarin Derivatives

Enantioselective Synthesis of Polycyclic Coumarin Derivatives Catalyzed by anin SituFormed Primary Amine-Imine Catalyst

2011 ◽  
Vol 13 (16) ◽  
pp. 4382-4385 ◽  
Author(s):  
Xi Zhu ◽  
Aijun Lin ◽  
Yan Shi ◽  
Jingyu Guo ◽  
Chengjian Zhu ◽  
...  
Keyword(s):  
Primary Amine ◽  
Enantioselective Synthesis ◽  
Coumarin Derivatives

scholarly journals Synthesis and Characterization of New Mannich Bases Derived from 7-hydroxy-4-methyl Coumarin

2016 ◽  
Vol 13 (2) ◽  
pp. 235-243
Author(s):  
Baghdad Science Journal
Keyword(s):  
Spectral Analysis ◽  
Mass Spectrum ◽  
Physical Properties ◽  
Benzene Ring ◽  
Sodium Acetate ◽  
Mannich Bases ◽  
Primary Amines ◽  
Synthesis And Characterization ◽  
Coumarin Derivatives

Coumarin is a natural substance isolated from different plants. It belonges to a group of benzobyrones which consists of a benzene ring joined to a pyrone nucleus. In the present research, a new series of coumarin derivatives were formed. Compound (1) (7-hydroxy-4-methyl Coumarin) was converted into 4-methylquinolin-2(H) derivative (2) by reaction with acetamide, and then reaction of (2) with thiosemicarbazide in ethanol leads to the synthesize of hydrazincarbothioamide derivative (3).The reaction of (3) with ethylchloroacetate in presence of sodium acetate leads to closure ring to get [(1-(5-oxo-2-thioxoimidazolidin-1-ylimino) ethyl)]quinolin-2(1H)-one (4). Mannich bases were prepared through the reaction of (4) with primary amines to form compounds (5-6). New coumarin derivatives were characterized by their physical properties and various spectral analysis like: FTIR, 1HNMR spectra and GC-Mass spectrum for some of them.

Enantioselective Synthesis of Coumarin Derivatives by PYBOX-DIPH-Zn(II) Complex Catalyzed Michael Reaction

2012 ◽  
Vol 77 (19) ◽  
pp. 8802-8808 ◽  
Author(s):  
Sumit K. Ray ◽  
Pradeep K. Singh ◽  
Nagaraju Molleti ◽  
Vinod K. Singh
Keyword(s):  
Michael Reaction ◽  
Enantioselective Synthesis ◽  
Coumarin Derivatives

Asymmetric reduction of phosphinyl imines with hydride reagents. Enantioselective synthesis of chiral primary amines

1987 ◽  
Vol 52 (4) ◽  
pp. 702-704 ◽  
Author(s):  
Robert O. Hutchins ◽  
Ahmed Abdel-Magid ◽  
Yuriy P. Stercho ◽  
Anthony Wambsgans
Keyword(s):  
Asymmetric Reduction ◽  
Enantioselective Synthesis ◽  
Primary Amines
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