Polymer-supported bisBINOL ligands for the immobilization of multicomponent asymmetric catalysts

Organic Letters

Volumn 5, Issue 15, 2003, Pages 2647-2650

  Sekiguti, Tetuya ^a   Iizuka, Yoshimasa ^a   Takizawa, Shinobu ^a   Jayaprakash, Doss ^a   Arai, Takayoshi ^a   Sasai, Hiroaki ^a  

^a OSAKA UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

2 CYCLOHEXENONE; ALKENE DERIVATIVE; DENDRIMER; GLYOXYLIC ACID; LIGAND; MALONIC ACID DERIVATIVE; OXIDE; POLYMER; STYRENE DERIVATIVE; TITANIUM DERIVATIVE;

ARTICLE; ASYMMETRIC CATALYSIS; CATALYSIS; CHEMICAL ANALYSIS; CHEMICAL STRUCTURE; IMMOBILIZATION; MICHAEL ADDITION; POLYMERIZATION; REACTION ANALYSIS; STEREOCHEMISTRY; STRUCTURE ANALYSIS;

EID: 0141520400     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol034797l     Document Type: Article

References (32)

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31. 2O (2 mL), 9 (46 μL, 0.45 mmol), and 10 (20 μL, 0.15 mmol). The enantiomeric purity of 11 was determined by chiral HPLC analysis (Daicel CHIRALPAK AS, i-PrOH/hexane = 1/4, 1.0 mL/min, 254 nm).
32. Recently, we have demonstrated a new and general concept for constructing multicomponent asymmetric catalysts using a "catalyst analogue". In this method, after copolymerization of a catalyst analogue having olefinic moieties with a monomer (e.g., MMA), the resulting polymer was used to prepare an active catalyst by exchanging the connecting group in the catalyst analogue with a catalytically active group. Arai, T.; Sekiguti, T.; Otsuki, K.; Takizawa, S.; Sasai, H. Angew. Chem., Int. Ed. 2003, 42, 2144-2147.