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- W2023078831 abstract "Die Reaktion von Dibromcarben mit 5-Methoxyhomobenzvalen (5) ergab das trans-Addukt 6, das sich durch Iodtrimethylsilan in Gegenwart von Triethylamin in den Trimethylsilylether 7 umwandeln ließ. Daraus wurde durch Kaliumcarbonat in Methanol 8,8-Dibromtetracyclo[5.1.0.02,4.03,5]octan-exo-6-ol (8) erhalten. Das auf dem üblichen Weg dargestellte Methansulfonat 9 von 8 ging mit Alkyllithiumverbindungen nicht in das erwartete Bromoctabisvalen 11 über, sondern lieferte ein Gemisch aus dem Bromoctavalen 12 und den (Brommethylen)homobenzvalenen 14. 4-Bromooctavalene and Two (Bromomethylene)homobenzvalenes Instead of an Expected Bromooctabisvalene The reaction of dibromocarbene with 5-methoxyhomobenzvalene (5) gave the trans adduct 6, which could be converted into the trimethylsilyl ether 7 with iodotrimethylsilane in the presence of triethylamine. Treatment of 7 with potassium carbonate in methanol afforded 8,8-dibromotetracyclo[5.1.0.02,4.03,5]octan-exo-6-ol (8). Prepared from 8 in the usual manner, the methanesulfonate 9 could not be transformed to the expected bromooctabisvalene 11 with alkyllithium compounds. Instead, a mixture of bromooctavalene 12 and the (bromomethylene)homobenzvalenes 14 was formed." @default.
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- W2023078831 date "1988-02-01" @default.
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- W2023078831 title "4-Bromoctavalen und zwei (Brommethylen)homobenzvalene anstelle eines erwarteten Bromoctabisvalens" @default.
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- W2023078831 doi "https://doi.org/10.1002/cber.19881210217" @default.
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