The Claisenrearrangement of bisallyl vinylethers with exceptionally bulky organoaluminumreagents exhibits unprecedented regiochemical control not observable in the ordinary thermal rearrangement.
Effects of organometals on the palladium-catalyzed tandem carbopalladation-cross coupling for preparing stereodefined exocyclic alkenes
作者:Ei-ichi Negishi、Yumiki Noda、Frédéric Lamaty、Edward J. Vawter
DOI:10.1016/s0040-4039(00)97630-5
日期:1990.1
The reaction of ω-(o-iodoaryl)- and ω-(-β-iodoalkenyl)alkynes with organometals containing Zr, Sn, Al, or B in the presence of a catalytic amount of a palladium-phosphine complex, such as Pd(PPh3)4, proceeds predominantly via initial cycliccarbopalladation followed by cross coupling, whereas the corresponding reaction of organozincs tends to be dominated by direct cross coupling.
Stereoselective Synthesis of 1,4-Bifunctional Compounds by Regioselective Pd-Catalyzed Allylic Substitution Reaction
作者:Naoyoshi Maezaki、Yuki Hirose、Tetsuaki Tanaka
DOI:10.1021/ol049374d
日期:2004.6.1
[reaction: see text] Highly stereoselective synthesis of 1,4-bifunctional compounds was accomplished via 1,2-asymmetric induction to alpha-oxyaldehyde followed by regio- and diastereoselective Pd-catalyzed allylicsubstitution reaction.
Synthèse de complexes σ-vinyliques de ferriporphyrines et leur oxydation en N-vinyl-porphyrines: Rétention de la stéréochimie de la double liaison
作者:Jean-Paul Battioni、Daniel Dupré、Daniel Mansuy
DOI:10.1016/s0022-328x(00)99778-x
日期:1987.7
obtained by reaction of the vinylic Grignard reagents R1R2CCHMgBr (R1 R2 C6H5, R1 R2 CH3, R1 H, R2 n-C4H9 and R1 n-C4H9, R2 H) with FeIII(meso-tetraarylporphyrin)(ClO4 complexes. The N-vinyl porphyrins derived from these σ-vinyl(porphyrin)iron(III) complexes by monoelectronic FeCl3 oxidation were isolated and completely characterized. This two-step route from vinylic Grignard reagents