Novel tridentate ligand formed by the condensation of two benzoyl isothiocyanate molecules in the presence of chlorotris(triphenylphosphine)rhodium

1975 ◽  
Vol 97 (16) ◽  
pp. 4748-4749 ◽  
Author(s):  
Martin Cowie ◽  
James A. Ibers ◽  
Yoshio Ishii ◽  
Kenji Itoh ◽  
Isamu Matsuda ◽  
...  
Keyword(s):  
Tridentate Ligand ◽  
Benzoyl Isothiocyanate

ChemInform Abstract: A NOVEL TRIDENTATE LIGAND FORMED BY THE CONDENSATION OF TWO BENZOYL ISOTHIOCYANATE MOLECULES IN THE PRESENCE OF RHCL(PPH3)3

1975 ◽  
Vol 6 (42) ◽  
pp. no-no
Author(s):  
MARTIN COWIE ◽  
JAMES A. IBERS ◽  
YOSHIO ISHII ◽  
KENJI ITOH ◽  
ISAMU MATSUDA ◽  
...  
Keyword(s):  
Tridentate Ligand ◽  
Benzoyl Isothiocyanate

Design and synthesis of a tridentate ligand for asymmetric bifunctional catalysis

2007 ◽  
Vol 48 (31) ◽  
pp. 5561-5564 ◽  
Author(s):  
Virginie Casarotto ◽  
Zhongtao Li ◽  
Julie Boucau ◽  
Yun-Ming Lin
Keyword(s):  
Tridentate Ligand ◽  
Bifunctional Catalysis ◽  
Design And Synthesis

New chiral tridentate ligands for asymmetric catalysis

2006 ◽  
Vol 78 (2) ◽  
pp. 311-320 ◽  
Author(s):  
Kevin Murtagh ◽  
Brian A. Sweetman ◽  
Patrick J. Guiry
Keyword(s):  
Asymmetric Catalysis ◽  
High Performance ◽  
Aromatic Aldehydes ◽  
Asymmetric Induction ◽  
Tridentate Ligand ◽  
Coupling Reactions ◽  
Tridentate Ligands ◽  
Molecular Complexation ◽  
Cross Coupling Reactions ◽  
Moderate Yield

The synthesis of new tridentate, isoquinoline-derived ligands, involving successive Suzuki cross-coupling reactions, is described. We were able to resolve 1-[3-(2-hydroxy-phenyl)-isoquinolin-1-yl]-naphthalen-2-ol via molecular complexation with N-benzylcinchonidinium chloride, whereas 1,3-bis(2-hydroxy-naphthalen-1-yl)-isoquinoline was resolved by chromatographic separation of its epimeric camphorsulfonates. Their barrier to rotation about the central biaryl axis was evaluated via racemization studies. Application of enantiopure 1,3-bis(2-hydroxynaphthalen-1-yl)-isoquinoline in the addition of diethylzinc to aldehydes proceeded in moderate yield but without asymmetric induction. A new tridentate ligand, 4-tert-butyl-2-chloro-6-[1-(2-hydroxymethyl-naphthalen-1-yl)-isoquinolin-3-yl]-phenol, was prepared in good yield and resolved by semipreparative high-performance liquid chromatography (HPLC). Its application in the addition of diethylzinc to a range of aromatic aldehydes proceeded in near perfect enantioselectivities at low ligand loadings of 1 mol %.

Komplexe des 1-Thia-4,7-diazacyclononans (L) mit Blei(II), Indium(III), Thallium(I) und (III) Kristallstruktur von [LPb][PbBr4] / Complexes of 1-Thia-4,7-diazacyclononane (L) with Lead(II), Indium(III), Thallium(I) and (III) Crystal Structure of [LPb][PbBr4]

1988 ◽  
Vol 43 (5) ◽  
pp. 567-570 ◽  
Author(s):  
Peter Hoffmann ◽  
Franz-Josef Hermes ◽  
Rainer Mattes
Keyword(s):  
Crystal Structure ◽  
Lone Pair ◽  
Tridentate Ligand ◽  
Crystal Data ◽  
Orthorhombic Space Group ◽  
Space Group

Abstract The reaction of 1-thia-4,7-diazacyclononane (C6H14N2S = L) with salts containing Tl(I) and (III), In(III) and Pb(II) ions yields 1:1 complexes, which can be crystallized as halide or Perchlorate salts. The structure of [LPb][PbBr4] (5) has been determined: Crystal data: orthorhombic, space group P212121, a = 853.2(6), b = 1000.1(4), c = 1860(1) pm, Z = 4. Pb2+ in the [LPb]2+ cation is seven-coordinated by the tridentate ligand and a square of four Br- ions. The Pb-S distance, 286.0(5) pm, is rather short, the lone pair stereochemically activ. The PbBr4- ions are polymeric with octahedrally coordinated lead(II) atoms.

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