97329-43-6Relevant articles and documents
Palladium-catalyzed borylation of sterically demanding aryl halides with a silica-supported compact phosphane ligand
Kawamorita, Soichiro,Ohmiya, Hirohisa,Iwai, Tomohiro,Sawamura, Masaya
supporting information; experimental part, p. 8363 - 8366 (2011/10/09)
Immobile but active: A silica-supported "compact" phosphane, Silica-SMAP, can be used in the Pd-catalyzed borylation of aryl chlorides or bromides with bis(pinacolato)diboron (see scheme). The Silica-SMAP/Pd system significantly expands the substrate scope of the borylation toward sterically and electronically challenging aryl halides.
Synthesis of 9,10-dihydrosilaanthracenes with substituents ortho to the silicon and methylene bridges
Bedard, Thomas C.,Corey, Joyce Y.,Lange, Lura D.,Rath, Nigam P.
, p. 261 - 272 (2007/10/02)
The generation of 9,10-dihydrosilaanthracenes with substituents on benzo ring carbons, specifically in the 4,5-positions adjacent to the methylene bridge, has been developed.Attempts to prepare the 1,8-isomer where the substituents are adjacent to the silicon bridge are also described.The diarylmethane precursors to the substituted 9,10-dihydrosilaanthracenes required the synthesis of 2,3-dihalotoluenes as well as isomeric 2,6-disubstituted benzaldehydes which were then condensed to diarylmethanols through the Grignard reagents.Ring closure to the 4,5-dimethyl-9,9-dialkyl-9,10-dihydro-9-silaanthracene, I, required the use of Rieke magnesium.The structure of I (alkyl = iPr) was determined and demonstrates that the introduction of substituents adjacent to the methylene bridge causes the dihydrosilaanthracene framework to become nearly planar with a dihedral (or butterfly) angle of 170 deg C.
Pharmaceutical compositions and methods of inhibiting phenylethanolamine N-methyltransferase
-
, (2008/06/13)
Pharmaceutical compositions and methods of inhibiting phenylethanolamine N-methyltransferase using 7 and/or 8 substituted 1,2,3,4-tetrahydroisoquinoline compounds.