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- W2050195218 abstract "Zur Untersuchung der Solvolysereaktionen der Cyclopropylidenalkylester 8, 9 und 10b,f,g wurden die Cyclopropylidenalkohole 8a, 9a und 10a synthetisiert. Die Darstellung von 2-Cyclopropylidencyclobutanol (10a) gelang durch Wittig-Reaktion des Tetrahydropyranyl-ethers 28 mit Cyclopropylidentriphenylphosphoran und Hydrolyse des entstehenden THP-Ethers 29. Die Solvolyse der Cyclopropylidenalkylester 8f und 10b in Lösungsmitteln unterschiedlicher Ionisierungsstärke ergab Produkte, die sich sowohl von den mesomeren Allylkationen 11 ↔ 11′ bzw. 14 als auch von den unter Ringöffnung entstandenen Kationen 13 bzw. 36 ableiten. Umlagerungsreaktionen zu den Vinylkationen 12 bzw. 15 wurden nicht beobachtet. Synthesis and Solvolyses of Cyclopropylidenealkyl Esters The cyclopropylidene alcohols 8a, 9a, and 10a are synthesized to study the solvolyses reactions of cyclopropylidenealkyl esters 8, 9, and 10b, f, g. The preparation of 2-cyclopro-pylidenecyclobutanol (10a) is achieved by Wittig reaction of its tetrahydropyranyl ether 28 with cyclopropylidenetriphenylphosphorane and hydrolysis of the tetrahydropyranyl ether 29 formed. The solvolyses of cyclopropylidenealkyl esters 8f and 10b in solvents of varying ionizing power yield products formed via the intermediate mesomeric allyl cations 11 ↔ 11′ or 14, respectively, as well as from the ring-opened cations 13 or 36, respectively. Rearrangement reactions to form vinyl cations 12 or 15 are not observed." @default.
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- W2050195218 date "1986-03-01" @default.
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- W2050195218 title "Synthese und Solvolyse von Cyclopropylidenalkylestern" @default.
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- W2050195218 doi "https://doi.org/10.1002/cber.19861190303" @default.
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