Diphosphanylketenimines: New Reagents fo
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Javier Ruiz; Fernando Marquínez; Víctor Riera; Marilín Vivanco; Santiago García-
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Article
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2002
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John Wiley and Sons
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English
⚖ 221 KB
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Two consecutive [3+2] cycloaddition reactions of the diphosphanylketenimine (PPh(2))(2)C[double bond]C[double bond]NPh (3), involving the phosphanyl groups, with two equivalents of the electron-poor alkynes dimethyl acetylenedicarboxylate or methyl acetylenecarboxylate give rise to the formation of