7368-65-2Relevant academic research and scientific papers
Heteroorganic betaines 3. * Reactions of betaines containing the +P-C-Si-S- fragment
Borisova,Zemlyanskii,Shestakova,Khrustalev,Ustynyuk,Chernyshev
, p. 933 - 941 (2007/10/03)
The [Ph3P+-CMe2-SiMe2-SEt]Br- salt was prepared by the reaction of betaine Ph3P+-CMe2SiMeR-S- (1a: R = Me) with EtBr. Acetylation of betaine 1a or Et3P+-CHMeSiMe2-S- (2a) afforded 2,2,6-trimethyl-1,3-dioxa-2-silacyclohex-5-ene-4-thione Me2SiOC(=S)CH=C(Me)O or the [Et3P+-CHMeSiMe2Cl]Cl- salt depending on the reagent ratio. The reactions of betaines 1a,b (1b: R = Ph) or 2 with compounds (R3Sn)2X (X = O or NMe) can be used for the generation of silanones [RMeSi=O] and silaneimines [RMeSi=NMe] in solutions. The reactivity of betaines Ph3P+-CHR1SiMeR2-S- (R1 = H or Me and R2 = Me or Ph) is determined by the equilibrium between the zwitterionic and ylide Ph3P=CR1SiMeR2SH tautomers that exist in solutions.
Reaktion von Acetyl-Uebergangsmetallkomplexen mit Phosphor-Yliden - ein weiteres Beispiel zur Halogenid/Metallat-Analogie
Malisch, Wolfgang,Blau, Herbert,Haaf, Franz Jakob
, p. 2956 - 2970 (2007/10/02)
The reaction of the acetyl metal complexes LnM-C(O)CH3Mo> with the phosphorus ylides (CH3)3P=CH2, C2H5(CH3)2P=CH2, (C2H5)3P=CHCH3 and (C4H9)3P=CH2 in the ratio 1:2 yields the corresponding acetyl-substituted ylides R3P=CR'C(O)CH3 3a - d (R = CH3, C2H5, n-C4H9; R' = H, CH3) and phosphonium metalates 4a - d, 6a, b via heterolysis of the Fe-C-?-bond and transylidation.With CH3C(O)Cl an analogous way of reaction is observed, which however can be repeated to give the diacetyl ylides R3P=C(COCH3)2 8a, b (R = CH3, n-C4H9).The new compounds are characterized by spectroscopic methods (NMR, IR) and further reactions.
