The preparation and reactions of alkynylphosphonate hexacarbonyldicobalt complexes
作者:R.John Baxter、Graham R. Knox、Mark McLaughlin、Peter L. Pauson、Mark D. Spicer
DOI:10.1016/s0022-328x(98)01201-7
日期:1999.5
The preparation of a series of hexacarbonyldicobalt alkynylphosphonate complexes, Co2(CO)6[R1CCP(O)(OR2)2] is reported. They are found to be unreactive under a range of conditions and this is ascribed to a combination of electron deficiency and alkyne π to phosphorus π-acceptor orbital interactions. Complexes of alkynyl carboxylates are more reactive. Reaction of diethyl 1-propynylphosphonate with
Novel, Stereoselective and Stereospecific Synthesis of Allenylphosphonates and Related Compounds via Palladium-Catalyzed Propargylic Substitution
作者:Marcin Kalek、Jacek Stawinski
DOI:10.1002/adsc.201100119
日期:2011.7
allenylphosphonates and related compounds based on a palladium(0)‐catalyzedreaction of propargylic derivatives with H‐phosphonate, H‐phosphonothioate, H‐phosphonoselenoate, and H‐phosphinate esters. The reaction is stereoselective and stereospecific, and provides a convenient entry to a vast array of allenylphosphonates and their analogues with diverse substitution patterns in the allenic moiety and at the phosphorus
作者:Jong Eoun Hong、Chi-Wan Lee、Youngcheol Kwon、Dong Young Oh
DOI:10.1080/00397919608003523
日期:1996.4
Abstract 1-Alkynylphosphonates 4 are prepared by the in situ β-elimination of enol phosphates 3, which are readily generated by the reaction of sodium enolate of 2-oxophosphonate with diethyl chlorophosphate.
Functional selectivity in phosphonate ester dealkylation with bromotrimethylsilane
作者:Charles E. McKenna、John Schmidhuser
DOI:10.1039/c39790000739
日期:——
Bromotrimethylsilane is highly selective for P–O silyldealkylation of mixed carboxylate–phosphonate alkyl esters and can be used to prepare trimethylsilyl amido-, alkynyl-, and iodoalkyl-phosphonates in good yield, thus making the corresponding phosphonic acids readily available via hydrolysis with neutral H2O.
溴代三甲基硅烷对混合的羧酸酯-膦酸酯烷基酯的P-O甲硅烷基脱烷基化反应具有高度选择性,可用于制备三甲基硅烷基酰胺基,炔基和碘代烷基膦酸酯,收率很高,因此使相应的膦酸易于通过中性H水解获得2 O.
Addition of secondary amines to alkynylphosphonates
作者:Anna E. Panarina、Alla V. Dogadina、Valentin I. Zakharov、Boris I. Ionin
DOI:10.1016/s0040-4039(01)00711-0
日期:2001.6
Addition of secondaryamines to alkynylphosphonates catalyzed by Cu(I) salts proceeds regio- and stereospecifically to form (E)-2-(dialkylamino)alkenylphosphonates. The E-configuration was proved by analysis of 13C–31P vicinal spin–spin coupling constants in the NMR spectra of the products and authentic model compounds. The 3JPC constants in the model compounds fall in the range of 6–12 Hz for the