ChemInform Abstract: ENTHALPY OF THE DIELS-ALDER REACTION OF CYCLOPENTADIEN AND MALEIC ANHYDRIDE

1974 ◽  
Vol 5 (24) ◽  
pp. no-no
Author(s):  
K. J. BRESLAUER ◽  
D. S. KABAKOFF
2002 ◽  
Vol 57 (6) ◽  
pp. 637-644 ◽  
Author(s):  
Krystyna Bogdanowicz-Szwed ◽  
Artur Budzowski

AbstractThe hetero-Diels-Alder reaction of 1-(2-furyl)-3-(dimethylamino)-2-propene-1-thione (diene) with maleic and fumaric acids, and β-nitrostyrenes yielded 3,4-dihydro-2H-thiopyran derivatives. Treatment of some of those cycloadducts with acetic acid caused elimination of dimethylamine yielding stable 2H-thiopyrans. Reaction of the diene with maleic anhydride furnished a cycloadduct which underwent spontaneous rearrangement to form an N,N-dimethylamide derivative. Cycloadditions of the diene to maleimide, N-phenylmaleimide, diethyl maleate, fumarate and butenolide, carried out in the presence of acetic anhydride,were followed by elimination of dimethylamine, afforded stable 2H-thiopyran derivatives.


2003 ◽  
Vol 107 (43) ◽  
pp. 9249-9249 ◽  
Author(s):  
Evgeni M. Glebov ◽  
Larisa G. Krishtopa ◽  
Victor Stepanov ◽  
Lev N. Krasnoperov

1991 ◽  
Vol 44 (8) ◽  
pp. 1085 ◽  
Author(s):  
JR Pearson ◽  
QN Porter

3-Vinylbenzofuran, 3-isopropenylbenzofuran and 2-methyl-3-vinylbenzofuran give normal [4π+2π] adducts with ethenetetracarbonitrile, accompanied, in the case of the last named diene, by the isomeric cyclobutane. Normal adducts also result from these dienes and 4-phenyl-1,2,4-triazoline-3,5-dione, and from 3-vinylbenzofuran and both maleic anhydride and N- phenylmaleimide. 3-Vinylbenzofuran gives the rearranged adduct dimethyl 1,2-dihydrodibenzofuran-3,4-dicarboxylate with dimethyl acetylenedicarboxylate.


1977 ◽  
Vol 30 (5) ◽  
pp. 1061 ◽  
Author(s):  
R Bergamasco ◽  
QN Porter

3-Vinylindene, 2-methyl-3-vinylindene and 3-isopropenylindene give normal, photostable adducts with ethenetetracarbonitrile by a Diels- Alder process. The first diene gives adducts with maleic anhydride, N- phenylmaleimide and dimethyl acetylenedicarboxylate. Where there is stereochemical ambiguity the adducts are shown by mass spectrometry to be exclusively endo. Two heterocyclic analogues are formed from 3- vinylindene with p-toluenesulphonyl cyanide and N-sulphinyl-p- toluenesulphonamide.


ChemInform ◽  
2010 ◽  
Vol 26 (50) ◽  
pp. no-no
Author(s):  
I. A. NURETDINOV ◽  
I. P. KARASEVA ◽  
V. P. GUBSKAYA ◽  
A. V. IL'YASOV

Author(s):  
V. M. Zhulin ◽  
M. V. Kel'tseva ◽  
V. S. Bogdanov ◽  
Yu. D. Koreshkov ◽  
E. B. Kabotyanskaya

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