62347-06-2Relevant academic research and scientific papers
Carbohydrate monophosphine, preparation method and uses thereof
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Paragraph 0142, (2020/05/01)
The present invention provides carbohydrate monophosphine having a general formula Ia, Ib, IIa or IIb, and a preparation method thereof, wherein the carbohydrate monophosphine comprises a mixture of Ia and Ib having different phosphorus atom configurations or a mixture of IIa and IIb having different phosphorus atom configurations. The invention relates to a borane adduct, an oxide, a sulfide or aselenide of the carbohydrate monophosphine. The invention also provides a carbohydrate monophosphine coordinated palladium complex, and uses of a catalytic system consisting of the carbohydrate monophosphine and a palladium salt or a complex, or the carbohydrate monophosphine coordinated palladium complex in catalysis of organic reactions, particular in catalysis of coupling reactions for formingC-C, or C-N bonds by using (pseudo) aryl halides.
P-chiral phosphinoselenoic chlorides and phosphinochalcogenoselenoic acid esters: Synthesis, characterisation, and conformational studies
Kimura, Tsutomu,Murai, Toshiaki
, p. 952 - 959 (2007/10/03)
(Chemical Equation Presented) P-Chiral alkyl or aryl phenylphosphinoselenoic chlorides were obtained by reacting PhPCl2 with Grignard reagents and elemental selenium. P-Chiral dialkyl chlorides were also obtained by treating PCl3 with two different Grignard reagents and elemental selenium. The structure of the chloride was determined by X-ray molecular structure analysis. P-Chiral phosphinochalcogenoselenoic acid esters bearing a P=Se double bond were synthesized by treating the chlorides with alkali metal alkoxide and chalcogenolates, whereas those bearing a P-Se single bond were obtained by sequential treatment of the chlorides with sodium hydroxide, sulfide or selenide, and alkyl iodides. X-ray molecular structure analyses of esters showed that they adopted gauche conformations. The computational results supported the observed conformational preference. Natural bond orbital analyses of the model compounds showed that two types of nonbonding orbital interactions, nE′ → σ*P=E and nE → σ*P-E′, are important in these compounds. Linear correlations were observed between the experimental 77Se NMR chemical shifts or the coupling constants of P-Se bonds in the esters and the calculated P-Se bond lengths of the model compounds.
[2+1] Cycloadditions of terminal alkynes to norbornene derivatives catalyzed by palladium complexes with phosphinous acid ligands
Bigeault, Julie,Giordano, Laurent,Buono, Gerard
, p. 4753 - 4757 (2007/10/03)
(Chemical Equation Presented) Two plus one makes three-membered rings in an unusual [2+1] cycloaddition of phenylethyne with norbornadiene as catalyzed by a new palladium(II) complex with phosphinous acid ligands (see scheme). A related complex (cyclohexy
