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- W2095388115 abstract "Die [2 + 2]-Cycloaddition der Thioketene 1a–f an die Isocyanate 2a–f liefert als Hauptprodukt 4-Thioxo-azetidinone 3, die sich zu 4-Imino-2-thietanonen 5 isomerisieren können. In Konkurrenzreaktionen werden 2,4-Azetidindione 8, N-Sulfonylamide 9 und 3H-1,2,4-Dithiazole 15 gebildet. Mit Chlorsulfonylisocyanat (20b) reagieren die Thioketene 1 zu N-unsubstituierten 4-Thioxo-2-azetidinonen 22. Je nach Thioketen 1 und Reaktionsführung resultieren auch die Verbindungen 23–26. Die Konstitution von 15b und 23a wurde durch Röntgenstrukturanalyse bestimmt. Cycloaddition Reactions of Heterocumulenes, XXIX. — Reactions of Thioketenes with Isocyanates The [2 + 2] cycloaddition of thioketenes 1a–f to isocyanates 2a–f yields 4-thioxo-2-azetidinones 3 as main products, which may isomerize to 4-imino-2-thietanones 5. In competing reactions, 2,4-azetidinediones 8, N-sulfonylamides 9, and 3H-1,2,4-dithiazoles 15 are formed. Thioketenes 1 react with chlorosulfonyl isocyanate (20b) to give N-unsubstituted 4-thioxo-2-azetidinones 22. Depending on the thioketene 1 and the reaction conditions, compounds 23–26 also result. The constitutions of 15b and 23a were determined by X-ray structural analyses." @default.
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- W2095388115 date "1988-04-01" @default.
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- W2095388115 title "Cycloadditionsreaktionen von Heterocumulenen, XXIX. Reaktion von Thioketenen mit Isocyanaten" @default.
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- W2095388115 doi "https://doi.org/10.1002/cber.19881210416" @default.
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