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Photochemical [3 + 2] cycloaddition of 2-cyanochromone to olefins

โœ Scribed by Isao Saito; Koji Shimozono; Teruo Matsuura

Publisher
Elsevier Science
Year
1982
Tongue
French
Weight
162 KB
Volume
23
Category
Article
ISSN
0040-4039

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## Abstract Selected [2+2]โ€cycloadditions of three alkylvinylketenes **2** to one monoโ€ and seven dialkylโ€olefins **3** yielded eleven 2โ€alkylโ€2โ€vinylcyclobutanones **4** __(Tables 1__ and __2).__ Three methods were compared, all involving __in situ__ generation of the ketenes **2** by HClโ€eliminat