An improved procedure for the preparation of 3-carbometfaoxy-4-oxotetrahydrothiopyran, 2- and 4-carbomethoxy-3-oxotetrahydrothiophene

1982 ◽  
Vol 60 (4) ◽  
pp. 437-439 ◽  
Author(s):  
Hsing-Jang Liu ◽  
Teng Ko Ngooi
Keyword(s):  
Methyl Methacrylate ◽  
Methyl Acrylate ◽  
Good Yield ◽  
Sodium Hydride ◽  
Major Product ◽  
Condensation Reactions ◽  
Lower Temperature ◽  
Direct Condensation

An improved procedure for the preparation of the title compounds 1-3 has been developed. Direct condensation of methyl 3-mercaptopropionate with methyl acrylate using sodium hydride as a base gave compound 1 in good yield. The reaction of methyl thioglycolate and methyl acrylate at 0 °C gave compound 2 as the major product whereas at lower temperature (−40 °C) isomer 3 was found as the major product. The condensation reactions of methyl thioglycolate with methyl methacrylate and crotonate were also carried out.

Two-dimensional NMR studies of acrylate copolymers

2009 ◽  
Vol 81 (3) ◽  
pp. 389-415 ◽  
Author(s):  
A. S. Brar ◽  
Ashok Kumar Goyal ◽  
Sunita Hooda
Keyword(s):  
Methyl Methacrylate ◽  
Methyl Acrylate ◽  
Quantum Coherence ◽  
Multiple Bond ◽  
Microstructural Analysis ◽  
2D Nmr ◽  
Correlation Spectroscopy ◽  
Nmr Studies ◽  
Poly Methyl Methacrylate ◽  
Nmr Study

High-resolution NMR spectroscopy is the most versatile, reliable, and generally acceptable technique for the determination of the microstructure of polymers. 2D NMR techniques, along with 1D NMR, have more potential to study absolute configurational assignments and sequence distribution of copolymers. Physical and chemical properties of polymers are influenced fundamentally by their microstructure. We discuss the detailed microstructure analysis of a large number of homopolymers, copolymers, and terpolymers. 2D NMR study of poly(methyl methacrylate) (PMMA), poly(methyl acrylate) (PMA), and poly(methacrylonitrile) (PMAN) is discussed in this article. In addition to homopolymers, 2D heteronuclear single-quantum coherence (HSQC), total correlation spectroscopy (TOCSY), and heteronuclear multiple-bond correlation (HMBC) study of different copolymers such as poly(methyl methacrylate-co-methyl acrylate), poly(styrene-co-methyl methacrylate), and poly(methyl methacrylate-co-methacrylonitrile) have also been reported here. This in turn helps in microstructural analysis of terpolymers such as poly(methacrylonitrile-co-styrene-co-methyl methacrylate), poly(acrylonitrile-co-methyl methacrylate-co-methyl acrylate), and poly(ethylene-co-vinyl acetate-co-carbon monoxide).

scholarly journals The dipolar cycloaddition of methyl acrylate to 1,5,6-trimethyl-3-oxidopyrazinium

2006 ◽  
Vol 62 (4) ◽  
pp. o1293-o1294 ◽  
Author(s):  
Madeleine Helliwell ◽  
Yun You ◽  
John A. Joule
Keyword(s):  
Methyl Acrylate ◽  
Quaternary Salt ◽  
Major Product ◽  
Dipolar Cycloaddition

5,6-Dimethylpyrazin-2-one reacts with iodomethane to give a quaternary salt, deprotonation of which liberates a 3-oxidopyrazinium which undergoes a 1,3-dipolar cycloaddition with methyl acrylate to form methyl 5,8-dimethyl-4-methylene-2-oxo-3,8-diazabicyclo[3.2.1]octane-6-exo-carboxylate, C11H16N2O3, as the major product.

Free-radical copolymerization of methyl acrylate with methyl methacrylate in benzene solution

Polymer ◽  
1993 ◽  
Vol 34 (8) ◽  
pp. 1786-1789 ◽  
Author(s):  
C. Arias ◽  
M.M.C. López-González ◽  
M. Fernández-García ◽  
J.M. Barrales-Rienda ◽  
E.L. Madruga
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Methyl Acrylate ◽  
Benzene Solution ◽  
Radical Copolymerization ◽  
Free Radical Copolymerization

Dynamics of adsorbed poly(methyl acrylate) and poly(methyl methacrylate) on silica

2003 ◽  
Vol 281 (3) ◽  
pp. 197-202 ◽  
Author(s):  
Frank D. Blum ◽  
Wuu-Yung Lin ◽  
Crystal E. Porter
Keyword(s):  
Methyl Methacrylate ◽  
Methyl Acrylate ◽  
Poly Methyl Methacrylate
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