71199-11-6Relevant academic research and scientific papers
Cyclopropanation of ketene silyl acetals with allylic acetates using η3-allylpalladium-pyridinylimidazole catalysts
Satake, Akiharu,Koshino, Hiroyuki,Nakata, Tadashi
, p. 49 - 50 (1999)
Highly selective cyclopropanation of ketene silyl acetals with allylic acetates was carried out in the presence of novel η3-allylpalladium-pyridinylimidazole complexes and sodium acetate in DMSO at room temperature. When cinnamyl acetate was used as an allylic acetate, phenylcyclopropane derivative was obtained stereoselectively in 83% yield.
Novel η3-allylpalladium-pyridinylpyrazole complex: Synthesis, reactivity, and catalytic activity for cyclopropanation of ketene silyl acetal with allylic acetates
Satake, Akiharu,Nakata, Tadashi
, p. 10391 - 10396 (2007/10/03)
Novel cationic η3-allylpalladium-pyridinylpyrazole complexes 1a and 1b were synthesized from 3-alkyl-5-(2-pyridinyl)pyrazole and η3-allylpalladium chloride dimer in the presence of AgBF4. Cationic complexes 1a and 1b were converted into neutral complexes 2a and 2b under basic conditions. These complexes were characterized by 1H, 13C, and 15N NMR studies. Neutral complexes 2a and 2b have high catalytic activity for cyclopropanation of ketene silyl acetals with allylic acetates. Comparison of the cationic and neutral complexes and the reaction mechanism of cyclopropanation were discussed.
