1 to 10 of 96 literature results

• Catalytic asymmetric addition of alcohols to imines: enantioselective preparation of chiral N,O-aminals.

  The enantioselective addition of alcohols to imine electrophiles has been shown to proceed in the presence of a catalytic amount of a chiral phosphori…

  Authors: Guilong Li, Frank R Fronczek, Jon C Antilla

  Source: Journal of the American Chemical Society. 2008 Sep 17

  View Full Text

• Several novel N-donor tridentate ligands formed in chemical studies of new fac-Re(CO)3 complexes relevant to fac-99mTc(CO)3 radiopharmaceuticals: attack of a terminal amine on coordinated acetonitrile.

  To evaluate syntheses of fac-[Re(CO)(3)L](+) complexes in organic solvents, we treated fac-[Re(CO)(3)(CH(3)CN)(3)]PF(6)/BF(4) in acetonitrile with tri…

  Authors: Theshini Perera, Patricia A Marzilli, Frank R Fronczek, Luigi G Marzilli

  Source: Inorganic chemistry. 2010 Mar 1

  View Full Text

• Syntheses and properties of a series of cationic water-soluble phthalocyanines.

  A series of symmetrical cationic phthalocyanines (Pcs) with either Zn(II) or Si(IV) metal ions and two bulky axial ligands on the silicon complexes wa…

  Authors: Hairong Li, Timothy J Jensen, Frank R Fronczek, M Graça H Vicente

  Source: Journal of medicinal chemistry. 2008 Feb 14

  View Full Text

• Tandem Nazarov cyclization-michael addition sequence catalyzed by an Ir(III) complex.

  The first examples of a tandem Nazarov cyclization/Michael addition process are described. The sequence is efficiently catalyzed by Ir[Me(CO)(dppe)(DI…

  Authors: Mesfin Janka, Wei He, Inga E Haedicke, Frank R Fronczek, Alison J Frontier, Richard Eisenberg

  Source: Journal of the American Chemical Society. 2006 Apr 26

  View Full Text

• A nanoporous Ag-Fe mixed-metal-organic framework exhibiting single-crystal-to-single-crystal transformations upon guest exchange.

  The reaction of solutions of Fe(Pyac)3 [PyacH=3-(4-pyridyl)-2,4-pentanedione] and AgNO3 produces two types of porous mixed-metal-organic frameworks (M…

  Authors: Yixun Zhang, Banglin Chen, Frank R Fronczek, Andrew W Maverick

  Source: Inorganic chemistry. 2008 Jun 2

  View Full Text

• Cyanogenic and non-cyanogenic pyridone glucosides from Acalypha indica (Euphorbiaceae).

  Seven cyanopyridone derivatives and one corresponding seco compound have been isolated from a methanolic extract of the inflorescences and leaves of A…

  Authors: Monika Hungeling, Matthias Lechtenberg, Frank R Fronczek, Adolf Nahrstedt

  Source: Phytochemistry. 2009 Jan

  View Full Text

• Synthesis and spectroelectrochemistry of N-cobaltacarborane porphyrin conjugates.

  N-Substituted porphyrins are well-known for the distortion they exhibit of the porphyrin plane through the sp(3) hybridization of one of the pyrroleni…

  Authors: Erhong Hao, Min Zhang, Wenbo E, Karl M Kadish, Frank R Fronczek, Brandy H Courtney, M Graça H Vicente

  Source: Bioconjugate chemistry. 2008 Nov 19

  View Full Text

• fac-[Re(CO)(3)L](+) complexes with N-CH(2)-CH(2)-X-CH(2)-CH(2)-N tridentate ligands. synthetic, X-ray crystallographic, and NMR spectroscopic investigations.

  Polyamine ligands (L) have excellent binding characteristics for the formation of fac-99mTc(CO)3-based radiopharmaceuticals. Normally, these L are ela…

  Authors: Anna Maria Christoforou, Patricia A Marzilli, Frank R Fronczek, Luigi G Marzilli

  Source: Inorganic chemistry. 2007 Dec 24

  View Full Text

• fac-Re(CO)3L complexes containing tridentate monoanionic ligands (L-) with a seldom-studied sulfonamido group as one terminal ligating group.

  To achieve a net-neutral coordination unit in radiopharmaceuticals with a fac-M(CO)3+ core (M = Tc, Re), facially coordinated monoanionic tridentate l…

  Authors: Anna Maria Christoforou, Frank R Fronczek, Patricia A Marzilli, Luigi G Marzilli

  Source: Inorganic chemistry. 2007 Aug 20

  View Full Text

• A cryptand/bisparaquat [3]pseudorotaxane by cooperative complexation.

  The formation of the first cryptand/bisparaquat [3]pseudorotaxane appears to be highly cooperative. The apparent value of K2 is 17 times that of K1.

  Authors: Feihe Huang, Frank R Fronczek, Harry W Gibson

  Source: Journal of the American Chemical Society. 2003 Aug 6

  View Full Text