The Synthesis, Structural Characterization and Photochemistry of Some 3-Phenylindenones
作者:John M. Kelly、T. Brian McMurry、Michael K. Seery、Sylvia M. Draper、Thomas McCabe
DOI:10.1055/s-2005-861799
日期:——
The synthesis of 3-phenylindenone (la), 6-methoxy-3-phenylindenone (1b), 2-bromo-6-methoxy-3-phenylindenone (1c) and 2-ethoxycarbonyl-6-methoxy-3-phenylindenone (1d) is described using two methods - synthesis via indanoneprecursors and synthesis via propanedione precursors. Crystal structures of 2-bromo-6-methoxy-3-phenylindanone, the synthetic precursor to 1b and 2-bromo-6-methoxy-3-phenylindenone
Protonation and cyclization of 1,3-diarylpropynones in superacids
作者:A. V. Vasil’ev、S. Walspurger、P. Pale、J. Sommer、M. Haouas、A. P. Rudenko
DOI:10.1007/s11178-005-0097-y
日期:2004.12
1,3-Diarylpropynones ArC≡CCOAr′ in superacids with H 0 ranging from −20 to − 14 undergo protonation at the carbonyl oxygen atoms to give stable ArC≡CC(O+H)Ar′ ions or at the acetylenic C2 atom with formation of reactive ArC+=CHCOAr′ species. The effects of the Ar and Ar′ substituents and reaction conditions on the intramolecular cyclization of ArC+=CHCOAr′ to 3-arylinden-1-ones are discussed.
An efficient synthesis of chiral 3-arylindanones via iridium-catalyzed asymmetrichydrogenation of 3-arylindenones has been developed. The reaction showed good compatibility with various functional groups, delivering a variety of 3-arylindanones in excellent yields and with good enantioselectivities. The reaction was also carried out on a gram-scale, delivering the product in quantitative yield. In
Electronic effects of substituents on the stability of the iridanaphthalene compound [IrCp*{C(OMe)CHC(o-C<sub>6</sub>H<sub>4</sub>)(Ph)}(PMe<sub>3</sub>)]PF<sub>6</sub>
作者:M. Talavera、J. Bravo、J. Castro、S. García-Fontán、J. M. Hermida-Ramón、S. Bolaño
DOI:10.1039/c4dt02744b
日期:——
transformation to the corresponding indanone derivatives. Stability studies of the iridanaphthalene compounds revealed that strong electron donor substituents (–OMe) stabilize the iridanaphthalene, while weak electron donor (–Me) and electron withdrawing (–NO2) groups favor the formation of indanone derivatives. Two possible indanone isomers can be obtained in the conversion of the unstable iridanaphthalene
A new, fast and efficient synthesis of 3-aryl indenones: intramolecular cyclization of 1,3-diarylpropynones in superacids
作者:Aleksander V Vasilyev、Stéphane Walspurger、Patrick Pale、Jean Sommer
DOI:10.1016/j.tetlet.2004.03.026
日期:2004.4
1,3-Diarylpropynones were cleanly converted to the corresponding 3-arylindenones in various superacidic media. This new. simple. one-pot reaction proved to be efficient (yields up to 95%) and very fast (reaction time less than 30 min). (C) 2004 Elsevier Ltd. All rights reserved.