Synthesis of Metal–(Pentadentate??Salen) Complexes: Asymmetric Epoxidation with Aqueous Hydrogen Peroxide and Asymmetric Cyclopropanation (salenH2: N, N′ …
H Shitama, T Katsuki
Index: Shitama, Hiroaki; Katsuki, Tsutomu Chemistry - A European Journal, 2007 , vol. 13, # 17 p. 4849 - 4858
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Citation Number: 43
Abstract
Abstract It is known that the rates and stereochemical outcomes of epoxidations and cyclopropanations using a metallosalen (salenH 2: N, N′-bis (salicylidene) ethylene-1, 2- diamine) complex as catalyst are affected by a trans effect of the apical ligand of the complex. By taking into consideration this trans effect, we have synthesized optically active pentadentate salen ligands bearing an imidazole or pyridine derivative as the fifth ...
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