Homo- and Cross-Olefin Metathesis Coupling of Vinylphosphane Oxides and Electron-Poor Alkenes: Access to P-Stereogenic Dienophiles
作者:Nikolai Vinokurov、Anna Michrowska、Anna Szmigielska、Zbigniew Drzazga、Grzegorz Wójciuk、Oleg M. Demchuk、Karol Grela、K. Michał Pietrusiewicz、Holger Butenschön
DOI:10.1002/adsc.200505463
日期:2006.5
Vinylphosphaneoxides 6 undergo catalytic olefin homo-metathesis leading to achiral and P-stereogenic diphosphane dioxides 7 with exclusive (E)-selectivity. Similarly, EWG-substituted vinylphosphaneoxides 11, 12 could be prepared with complete (E)-olefin selectivity via olefin cross-metathesis with electron-deficient substrates, such as methyl acrylate and 2-fluorostyrene, using nitro-Hoveyda ruthenium
Synthesis of enantiomerically pure styryl and dienyl phosphine oxides via Pd-catalyzed Heck coupling reaction
作者:K. Michał Pietrusiewicz、Maciej Kuźnikowski、Marek Koprowski
DOI:10.1016/s0957-4166(00)80060-9
日期:1993.10
Stereoselective nitrone additions to vinylphosphine derivatives: effect of phosphorus substituents on reaction diastereoselectivity
作者:Alberto Brandi、Stefano Cicchi、Andrea Goti、K. Michal Pietrusiewicz、Maria Zablocka、Witold Wisniewski
DOI:10.1021/jo00014a011
日期:1991.7
Meaningful diastereofacial selectivity in cycloaddition of 2,2-dimethyl-3,4-pyrroline N-oxide (DMPO) to 12 structurally diversified vinylphosphine derivatives 1-12 has been achieved by proper choice of the polar substituent on phosphorus combined with effective steric differentiation of the remaining substituents. The unique sense of induction in all these reactions is consistent with the assumption that vinylphosphorus dipolarophiles prefer an s-cisoid array of C = C - P = X fragments in their reactive conformations. Use of divinylphosphine derivatives in such reactions exemplifies the possibility of synthesizing chiral phosphine oxides and sulfides from prochiral precursors in a highly selective and stereochemically predictable manner. An observation that in P-31 NMR spectra the adducts of type I are uniformly found at lower field than adducts of type II facilitates the stereochemical assignments.
XU YUANYAO; XIA JIAZHI; GUO HUIJU, SYNTHESIS,(1986) N 8, 691-692
作者:XU YUANYAO、 XIA JIAZHI、 GUO HUIJU
DOI:——
日期:——
Palladium-Catalysed Synthesis of Alkenyldiphenyl- and Alkenylbenzylphenylphosphine Oxides
作者:Yuanyao Xu、Jiazhi Xia、Huiju Guo
DOI:10.1055/s-1986-31753
日期:——
Alkenyldiphenyl-and Alkenylbenzylphenyl phosphine oxides 3 were prepared by the palladium catalysed reaction of alkenyl bromides 1 with phosphine oxides 2a or 2b.