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Volumn , Issue 1, 2008, Pages 0089-0093

Chiral C2-symmetric Cu(II) complex immobilized in ionic liquids: A recoverable catalytic system for enantioselective hetero-Diels-Alder reaction

Author keywords

Catalyst recycling; Chiral bis(oxazoline) copper complex; Enantioselective; Hetero Diels Alder reaction; Ionic liquid

Indexed keywords

CUPRIC ION; DICHLOROMETHANE; IONIC LIQUID;

EID: 38549143637     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2007-1000830     Document Type: Article
Times cited : (6)

References (40)
  • 1
    • 0003544583 scopus 로고    scopus 로고
    • 2nd ed, Ojima, I, Ed, VCH: New York
    • (a) Catalytic Asymmetric Synthesis, 2nd ed.; Ojima, I., Ed.; VCH: New York, 2000.
    • (2000) Catalytic Asymmetric Synthesis
  • 8
  • 28
    • 38549150574 scopus 로고    scopus 로고
    • Representative Procedure for Asymmetric hetero-Diels-Alder Reaction Chiral bis(oxazoline) ligand 3 (13.6 mg, 0.046 mmol) and copper(II) trifluoromethanesulfonate (16 mg, 0.044 mmol) were put into a screw-capped vial (10 mL capacity, flat bottom, and ionic liquid (0.88 mL) was added. After the mixture was stirred vigorously for 3 h, the unsaturated ester (0.441 mmol) and enol ether (0.882 mmol) were added via syringe at 3 (±1)°C, After the indicated time, the reaction mixture was extracted with Et2O until there was no detectable amount of product. And volatile components from the extracted solution were removed under reduced pressure. Then the crude product was purified by silica gel column chromatography to give the desired product. Recovered ionic liquid and metal-ligand complex were reused for recycling experiments after drying under reduced pressure
    • 2O until there was no detectable amount of product. And volatile components from the extracted solution were removed under reduced pressure. Then the crude product was purified by silica gel column chromatography to give the desired product. Recovered ionic liquid and metal-ligand complex were reused for recycling experiments after drying under reduced pressure.
  • 33
    • 38549120530 scopus 로고    scopus 로고
    • The ionic liquids were purchased from C-TRI Co, Ltd
    • The ionic liquids were purchased from C-TRI Co., Ltd. (www.c-tri.com).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.