Cycloadditionen von Ketenen mit Fulvenen/Cycloadditions of Ketenes with Fulvenes
1983 ◽
Vol 38
(4)
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pp. 504-515
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Keyword(s):
X Ray
◽
Fulvenes (1) add ketenes (2) in a [ π 2 + π 2] manner to give bicyclo[3.2.0]heptenes (3). Ring cleavage with sodium methoxide yields dihydrofulvenes (4) which can be deliydrogenated to give fulvenes (5), whereas the acid catalyzed ring opening reaction of 3 leads to fulvenes (6). The structure of 3h has been clarified by X-ray crystallography.
2005 ◽
Vol 46
(6)
◽
pp. 1005-1008
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1979 ◽
Vol 20
(25)
◽
pp. 2369-2372
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Keyword(s):
Keyword(s):