76287-37-1Relevant academic research and scientific papers
New Reactivity Patterns in 3H-Phosphaallene Chemistry [Aryl-P=C=C(H)-tBu]: Hydroboration of the C=C Bond, Deprotonation and Trimerisation
Tendyck, Jonas C.,Hepp, Alexander,Würthwein, Ernst-Ulrich,Uhl, Werner
, p. 15977 - 15988 (2020/10/21)
3H-Phosphaallenes, R?P=C=C(H)C?R’ (3), are accessible in a multigram scale on a new and facile route and show a fascinating chemical reactivity. BH3(SMe2) and 3 a (R=Mes*, R’=tBu) afforded by hydroboration of the C=C bonds of two phosphaallene molecules an unprecedented borane (7) with the B atom bound to two P=C double bonds. This compound represents a new FLP based on a B and two P atoms. The increased Lewis acidity of the B atom led to a different reaction course upon treatment of 3 a with H2B-C6F5(SMe2). Hydroboration of a C=C bond of a first phosphaallene is followed in a typical FLP reaction by the coordination of a second phosphaallene molecule via B?C and P?B bond formation to yield a BP2C2 heterocycle (8). Its B?P bond is short and the B-bound P atom has a planar surrounding. Treatment of 3 a with tBuLi resulted in deprotonation of the β-C atom of the phosphaallene (9). The Li atom is bound to the P atom as demonstrated by crystal structure determination, quantum chemical calculations and reactions with HCl, Cl-SiMe3 or Cl-PtBu2. The thermally unstable phosphaallene Ph?P=C=C(H)-tBu gave a unique trimeric secondary product by P?P, P?C and C?C bond formation. It contains a P2C4 heterocycle and was isolated as a W(CO)4 complex with two P atoms coordinated to W (15).
New Approach to Phosphinoalkynes Based on Pd- and Ni-Catalyzed Cross-Coupling of Terminal Alkynes with Chlorophosphanes
Beletskaya, Irina P.,Afanasiev, Vladimir V.,Kazankova, Marina A.,Efimova, Irina V.
, p. 4309 - 4311 (2007/10/03)
(Equation presented) The first example of direct phosphination of terminal alkynes with chlorophosphanes catalyzed by Ni or Pd complexes is described. Both aromatic and aliphatic terminal acetylenes undergo the coupling reaction to give corresponding coup
COMPOSES ORGANIQUES DU PHOSPHORE XIV VOIES D'ACCES AUX SELS DE DIHYDROAZAPHOSPHORINANIUM-1,4 ET DES Pv AZAPHOSPHORINES-1,4 CORRESPONDANTES. SYNTHESES DES HETEROCYCLES SUBSTITUES EN 2 ET 6 PAR DES GROUPEMENTS ter-BUTYLE
Skolimowski, J.,Skowronski, R.,Simalty, M.
, p. 159 - 166 (2007/10/02)
The title compounds 11 were obtained from δ-diketo-dipinacolyl phosphonium cations 8 by action of AcONH4/AcOH.These cations were prepared according to three different methods A, B and C.Method B allows a direct synthesis of cation 8 from a pinacolyl phosp
