118214-15-6Relevant articles and documents
Condensation of Lithium Diphenylphosphonium Diylides with Carbonic Anhydride Derivatives. A New One-Pot Synthesis of α,β-Unsaturated Anilides and Amidines.
Cristau, Henri-Jean,Perraud-Darcy, Anne,Ribeill, Yves
, p. 2693 - 2696 (2007/10/02)
Lithium diphenylphosphonium diylides readily attack phenylisocyanate and dicyclohexylcarbodiimide.The formed semi-stabilised ylides bear a metallated amide or amidine functium.Their use in situ as Wittig reagents towards aldehydes and ketones is shown to be a new one-pot, E-stereoselective synthesis for α,β-unsaturated anilides and amidines.Moreover, the corresponding phosphonium salts were isolated.Key Words: lithium phosphonium diylides; pseudo-acylation reaction; Wittig-reaction; vinylic amides and amidines.
Phosphonium-benzylide und Alkali-: Beispiele fuer salzfreie Ylide und korrespondierende Alkalikomplexe
Schmidbaur, Hubert,Deschler, Ulrich,Milewski-Mahrla, Beatrix,Zimmer-Gasser, Beate
, p. 608 - 619 (2007/10/02)
Phosphonium salts R2P(CH2C6H5)2+Br- (with R = CH3, CH2C6H5, or C6H5) were prepared from phosphane precursors with benzyl bromide and converted into the corresponding ylides R2P(CH2C6H5)=CHC6H5 (3a-c).These ylides react with lithiumal