Помогите пожалуйста найти следующие статьи:
1. Pfoertner, K. H. Reaktionen von Tetracyanoäthylen mit Polyenen.Helvetica Chimica Acta Volume 58, Issue 3 , P. 833 – 839.
2. Pfoertner, K, H., Oberhansli, WE. Eine Cyanogruppe als Dienophil in einer intramolekularen 4 + 2-Cycloaddition. Helvetica Chimica Acta. Volume 58, Issue 3, P. 840-846
3. Shigeru Kurata, Takenori Kusumi, Yoshinobu Inouye and Hiroshi Kakisawa. Synthesis of dihydroactiniolide [5,6,7,7a-tetrahydro-4,4,7a-trimethylbenzofuran-2(4H)-one] and 6,7,8,8a-tetrahydro-5,5,8a-trimethylnaphthalene-1,3(5H)-dione from 6,7,8,8a-tetrahydro-2,5,5,8a-tetramethyl-5H-chromen. J. Chem. Soc., Perkin Trans. 1, 1976, 532
4. Fischer, G. W., Zimmermann, T., Weissenfels, M. Pyryliumverbindungen. XVIII, 2-Alkoxy-2H-pyrane aus tetra- und pentasubstituierten Pyryliumsalzen. Journal fur Praktische Chemie
Volume 325, Issue 5, Date: 1983, P. 729-741.
5. J.E. Baldwin and K.K. Pinschmidt, Jr., The cycloaddition of bicyclo[2.1.0]pent-2-ene with tetracyanoethylene. Tetrahedron Letters, 935 (1971). P. 935-938.
Код: Выделить всё
http://dx.doi.org/10.1016/S0040-4039(01)96593-1
6. Huth, A., Straub, H., Muller, E. Valenzisomerisierungen am tetramethyl-cyclobuten : 5. Mitteilung. Tetrahedron Lett. 1973, P. 2845-2848.
Код: Выделить всё
http://dx.doi.org/10.1016/S0040-4039(01)96067-8
7. Friedrichsen, W Bottcher, A., Kappe, T. Six-membered Mesoionic Heterocycles of the m-Quinodimethane Dianion Type. Heterocycles. 1982, Vol 19, Issue 6, p.1083-1148
doi не нашел
Код: Выделить всё
https://www2.heterocycles.jp/u2/library/FMPro?-db=journalred.fp5&-format=/w2/JournalDetail.html&-lay=data&-Token.0=&-Token.3=R-1982-06-1083&-recid=40316&-Script=citation&-find
8. Otohiko Tsuge, Minoru Tanaka, Hiroshi Simoharada, and Michihiko Noguchi. 2-Methylene-3-phenacylbenzothiazoline: Dimerization and Reactions with Electron-deficient Acetylenes and Olefins. Heterocycles. 1981, Vol 16, Issue 10, p.1705-1712
doi не нашел
Код: Выделить всё
https://www2.heterocycles.jp/u2/library/FMPro?-db=journalred.fp5&-format=/w2/JournalDetail.html&-lay=data&-Token.0=&-Token.3=R-1981-10-1705&-recid=39954&-Script=citation&-find
9. Fieser and Fieser's Reagents for Organic Synthesis Tetracyanoethylene
Standard Article. Tse-Lok Ho, Mary Fieser, Louis Fieser, Janice Smith
Код: Выделить всё
http://dx.doi.org/10.1002/9780471264194.fos09566
Заранее благодарен
: