130156-82-0Relevant academic research and scientific papers
Palladium-Catalyzed [2+1] Cycloadditions Affording Vinylidenecyclopropanes as Precursors of 7-Membered Carbocycles
Lepronier, Aymeric,Achard, Thierry,Giordano, Laurent,Tenaglia, Alphonse,Buono, Gerard,Clavier, Herve
, p. 631 - 642 (2016/02/27)
Palladium(II) acetate in association with secondary phosphine oxides provides an efficient catalytic system for [2+1] cycloadditions starting from oxanorbornene derivatives and tertiary propargyl esters giving rise to vinylidenecyclopropanes. This reaction is specific to bidentate phosphinito-phosphinous acid ligands generated from secondary phosphine oxides. The [2+1] cycloaddition was found broad in scope with a high tolerance to various functional groups. Moreover, vinylidenecyclopropanes were straightforwardly converted into oxabicyclo[3.2.1]oct-2-ene derivatives through a palladium-catalyzed ring-expansion. Finally, the oxa bridge cleavage of oxatricyclic compounds yields functionalized 7-membered carbocycles.
Copper-catalyzed enantioselective formal hydroamination of oxa- and azabicyclic alkenes with hydrosilanes and hydroxylamines
Miki, Yuya,Hirano, Koji,Satoh, Tetsuya,Miura, Masahiro
supporting information, p. 1498 - 1501 (2014/04/03)
A CuCl/(R,R)-Ph-BPE-catalyzed enantioselective formal hydroamination of oxa- and azabicyclic alkenes with polymethylhydrosiloxane (PMHS) and O-benzoylhydroxylamines has been developed. The efficient and stereoselective net addition of hydrogen and nitrogen atoms provides the corresponding optically active oxa- and azanorbornenyl- and -norbornanylamines in good yields and good enantiomeric ratios.
Convenient synthesis of meso-cyclohexa-1,3-dienes by one-pot two-step deoxygenation of 7-oxabicyclo[2.2.1]hept-2-enes
Yano, Tomotsugu,Fujishima, Takashi,Irie, Ryo
experimental part, p. 818 - 822 (2010/10/02)
Iron(III) hydroxide oxide was found to be an efficient catalyst for the ring-opening reaction of 5,6-cis-disubstituted 7-oxabicyclo[2.2.1]hept-2-enes with acetyl bromide in dichloromethane at room temperature to give cyclohexene derivatives with leaving groups (acetoxy or bromo groups) disposed on each allylic position. A successive one-pot treatment of the reaction mixture with zinc powder and tetrahydrofuran successfully induced reductive 1,4-elimination to afford synthetically useful 5,6-disubstituted mesocyclohexa-1,3-dienes in good-to-high yields. Georg Thieme Verlag Stuttgart.
