ChemInform Abstract: PREPARATION OF A PHOSPHORUS YLID FROM 1,3‐DITHIOLAN‐2‐YLTRIPHENYLPHOSPHONIUM FLUOROBORATE AND ITS APPLICATION TO KETENE S,S‐ACETAL SYNTHESIS
Abstract:Z‐Ethoxy‐l ,3‐ dithiolan (I) bildet mit Triphenylphosphin (II) und Tetrafluoroborsäure das Phosphoniumsalz (III), das nach Deprotonierung zum Ylid (IV) mit Aldehyden (V), nicht jedoch mit Ketonen, Keten‐S,S‐acetale (VI) und mit Nitrosobenzol das Imin (VIII) ergibt.
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