Free-Radical Species from Methyl Vinyl Ketone in Aqueous Solution: A Pulse Radiolysis Study

1990 ◽  
Vol 27 (3) ◽  
pp. 299-308 ◽  
Author(s):  
Manmohan Kumar ◽  
M. H. Rao ◽  
P. N. Moorthy
Keyword(s):  
Aqueous Solution ◽  
Free Radical ◽  
Pulse Radiolysis ◽  
Vinyl Ketone ◽  
Methyl Vinyl Ketone ◽  
Radical Species ◽  
Methyl Vinyl ◽  
Free Radical Species

The Michael adduct of L-ascorbic acid to methyl vinyl ketone: its remarkable self-condensation and other reactions

1987 ◽  
Vol 65 (1) ◽  
pp. 131-136 ◽  
Author(s):  
Regina Arnold ◽  
Gabor Fodor ◽  
Clifford George ◽  
Isabella Karle
Keyword(s):  
Aqueous Solution ◽  
Ascorbic Acid ◽  
Vinyl Ketone ◽  
Methyl Vinyl Ketone ◽  
Methyl Vinyl ◽  
X Ray ◽  
Michael Adduct ◽  
X Ray Crystallography ◽  
Product Mixture ◽  
Acid Catalyzed

The structure of the Michael adduct of L-ascorbic acid (1) to methyl vinyl ketone was established as 2-(3-oxobutyl)-3-oxo-L-gulonolactone [Formula: see text] hemiketal (3). In aqueous solution 3 is prone to undergo base- or acid-promoted degradations. 1-(2-Furyl)-1,4-pentanedione was isolated from the acidic product mixture. Under strictly anhydrous acid-catalyzed conditions, if a suitable nucleophile like ethanol is present, the tricyclic ethyl ketal 6b forms. In the absence of a nucleophile, the unexpected self-condensation of 3 occurs leading to cyclo-trimer 7, the structure of which was established by X-ray crystallography. Trimer 7, held together via ketal bridges, is converted quantitatively into the tricyclic methyl ketal 6a in methanolic hydrogen chloride. Mechanisms are proposed for the formation of 6a and b or 7.

Copolymerization of methyl vinyl ketone with styrene in the presence of cobalt(II) nitrate

1991 ◽  
Vol 47 (1) ◽  
pp. 329-336 ◽  
Author(s):  
Seizo Masuda ◽  
Keiji Minagawa ◽  
Masami Tanaka ◽  
Yutaka Asahi
Keyword(s):  
Vinyl Ketone ◽  
Methyl Vinyl Ketone ◽  
Methyl Vinyl

CYTOTOXIC REACTIONS OF FREE RADICAL SPECIES OF OXYGEN

1978 ◽  
Vol 28 (4-5) ◽  
pp. 887-905 ◽  
Author(s):  
Donald C. Borg ◽  
K. M. Schaich ◽  
J. J. Elmore Jr ◽  
J. A. Bell
Keyword(s):  
Free Radical ◽  
Radical Species ◽  
Free Radical Species
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