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One-pot reactions of 2,4-(dioxobutylidene)phosphoranes. Efficient synthesis of 4-(2-hydroxybenzoyl)salicylic acid derivatives and buta-1,3-diene-1,4-dicarboxylates

✍ Scribed by Edith Holtz; Uwe Albrecht; Peter Langer


Book ID
118501443
Publisher
Elsevier Science
Year
2007
Tongue
French
Weight
371 KB
Volume
63
Category
Article
ISSN
0040-4020

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## Abstract magnified image The reactive zwitterionic 1 : 1 intermediate **6** generated __in situ__ from the reaction between an isocyanide **2** and a dialkyl acetylenedicarboxylate (=dialkyl but‐2‐ynedioate) **3** was trapped by an __N__‐arylmaleimide or ‐phthalimide **4** to produce a highly f