Eine einfache Allencarbonsäureester??Synthese mittels der Wittig??Reaktion
RW Lang, HJ Hansen
Index: Lang, Robert W.; Hansen, Hans-Juergen Helvetica Chimica Acta, 1980 , vol. 63, # 2 p. 438 - 455
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Citation Number: 113
Abstract
Summary A simple one-pot synthesis of variously substituted a-allenic esters (7-23, CJ Scheme 4) is described. Either of the phosphonium salts 1 and 2 or the phosphoranes 3-6 in methylene chloride (or acetonitrile) when treated with acid chlorides at room temperature in the presence of triethylamine give the corresponding allenic compounds in fairly good yields (cJ: Tables 3a and 3b). This procedure shows for the first time, that the Wittig-reaction with ...
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