scholarly journals Asymmetric Perturbation of Carboxyl Chromophores in Optically Active Random Copolymers of Acrylic Acid and (+) N-s-Butyl-Nmethylacrylamide

1980 ◽  
Vol 12 (11) ◽  
pp. 785-792 ◽  
Author(s):  
Christian Braud ◽  
Michel Vert
Keyword(s):  
Acrylic Acid ◽  
Optically Active ◽  
Random Copolymers ◽  
Asymmetric Perturbation

Spectroscopic and Solution Properties of Phenoxyphosphazene Random Copolymers Containing Optically Active Binaphthoxy Groups

2000 ◽  
Vol 33 (10) ◽  
pp. 3671-3679 ◽  
Author(s):  
Gabino A. Carriedo ◽  
Francisco J. García Alonso ◽  
Paloma Gómez Elipe ◽  
José L. García-Alvarez ◽  
M. Pilar Tarazona ◽  
...  
Keyword(s):  
Optically Active ◽  
Random Copolymers ◽  
Solution Properties

Controlled release of an optically active compound by hydrogels of acrylic acid and its online detection

2017 ◽  
Vol 96 (5) ◽  
pp. 1221-1227 ◽  
Author(s):  
Leandro G. Aguiar ◽  
Daniel C. Iwakura ◽  
Ana T. S. Semeano ◽  
Rosamaria W. C. Li ◽  
Esmar F. Souza ◽  
...  
Keyword(s):  
Controlled Release ◽  
Acrylic Acid ◽  
Active Compound ◽  
Optically Active ◽  
Online Detection

Preparation of New Optically Active Furanoids Containing Various Aza-Heterocyclic Moieties

1997 ◽  
Vol 62 (6) ◽  
pp. 894-912 ◽  
Author(s):  
Ali Werfeli ◽  
Jan Čejka ◽  
Ondřej Klecán ◽  
Bohumil Kratochvíl ◽  
Josef Kuthan
Keyword(s):  
Schiff Base ◽  
Acrylic Acid ◽  
Primary Alcohol ◽  
Optically Active ◽  
Complex Mixtures ◽  
Knoevenagel Reaction ◽  
Pyridinium Chloride ◽  
X Ray ◽  
Dihydropyridine Derivative ◽  
Pyridinium Perchlorate

The aldehyde 2 prepared from [5-(2,3-O-isopropylidene-β-D-erythrofuranosyl)-2-methylfuran-3-yl]methanol (1) was converted to E,Z-oximes 3, 4 and imine derivative 5 by the reaction with hydroxylamine and pyridin-2-yl amine, respectively. The Knoevenagel reaction with malonic acid afforded exclusively the 3-substituted acrylic acid 6 while corresponding Hantzsch 1,4-dihydropyridines 7 and 8 were obtained by the reaction of aldehyde 2 with ethyl acetoacetate or acetylacetone and ammonia. 3,5-Dicyano-1,4-dihydropyridine derivative 9 was isolated only in forms of hydrates after the reaction of aldehyde 2 with 3-aminocrotonitrile. 1,4-Dihydropyridines 7 and 9 were aromatized to corresponding pyridines 10 and 11. Isoxazoles 12, 13 and isoxazolines 14, 15 were prepared by 1,3-cycloaddition of appropriate dienophiles to a nitrile oxide generated from aldoximes 3, 4. Ferricyanide oxidation of 1-{[5-(2,3-O-isopropylidene-β-D-erythrofuranosyl)-2-methylfuran-3-yl]methyl}pyridinium chloride (17a), -3-methylpyridinium chloride (19a) and the corresponding isoquinolinium chloride 21a gave optically active pyridin-2(1H)-ones 22, 23 and 2H-isoquinolone derivative 24 while the procedure with 2-methylpyridinium salt 18a and 4-methylpyridinium salt 20a led to complex mixtures of products. Reaction of 2,4,6-triphenylpyrylium perchlorate with furanoid amine 26 afforded a mixture of major 2,4,6-triphenylpyridine, minor pyridinium perchlorate 25 and primary alcohol 1. The absolute configuration of the studied compounds has been confirmed by X-ray analysis of the Schiff base 5.

The Synthesis of Amphiphilic Chiral Dendritic 1,1′-Bi-2-Naphthol Derivatives and their Application as Amphiphiles in Aqueous Asymmetric Hydrogenation

2002 ◽  
Vol 2002 (7) ◽  
pp. 318-320 ◽  
Author(s):  
Qing-Hua Fan ◽  
Rui Zhang ◽  
Guo-Jun Deng ◽  
Xiao-Min Chen
Keyword(s):  
Acrylic Acid ◽  
Aqueous Media ◽  
Asymmetric Hydrogenation ◽  
Optically Active ◽  
Coupling Reactions ◽  
Aryl Ether ◽  
Naphthol Derivatives

Six new amphiphilic chiral dendritic BINOLs were synthesised via coupling reactions of optically active BINOL and the Frèchet-type poly(aryl ether) dendrons with peripheral oligo(ethyleneglycol) groups, and were used as amphiphiles for promoting the asymmetric hydrogenation of 2-[p-(2-methylpropyl)- phenyl]acrylic acid in an aqueous media.

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