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- W2063130147 abstract "Dicyclopropylacctylen (9) wird in zwei Stufen aus Dicyclopropylketon über eine Fritsch-Buttenberg-Wiechell-Umlagerung von 1-Chlor-2.2-dicyclopropyl-äthylen (7) dargestellt. Seine katalytische Hydrierung in Gegenwart von Lindlar-Katalysator bzw. Lithiumalanat führt stereoselektiv zu cis- bzw. trans-Dicyclopropyläthylen (12, 14). Die Cycloaddition von 9 an Fluor- bzw. Chlorsulfonylisocyanat und von cis-Dicyclopropyläthylen an Chlorsulfonyl-isocyanat ergibt in hohen Ausbeuten die Cycloaddukte 20 und 18 bzw. 21 mit intakten Cyclopropylgruppen. Dicyclopropylacetylene – Synthesis, Stereoselective Hydrogenations, and some Cycloadditions Dicyclopropylacetylene (9) is prepared in two steps from dicyclopropyl ketone via a Fritsch-Buttenberg-Wiechell rearrangement of 1-chloro-2.2-dicyclopropylethylene (7). Stereo-selective catalytic hydrogenations of 9 with Lindlar catalyst and with lithium aluminium hydride yield cis- and trans-dicyclopropylethylene (12, 14), respectively. The cycloaddition of 9 to fluoro- and chlorosulfonyl isocyanate and of cis-dicyclopropylethylene to chlorosulfonyl isocyanate furnishes high yields of adducts 20, 18 and 21, respectively, without ring opening of the cyclopropyl groups." @default.
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- W2063130147 date "1972-05-01" @default.
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- W2063130147 title "Dicyclopropylacetylen – Darstellung, stereoselektive Hydrierungen und einige Cycloadditionen" @default.
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- W2063130147 doi "https://doi.org/10.1002/cber.19721050524" @default.
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