Conjugate addition of unmodified aldehydes: Recycle of heterogeneous amine catalyst and ionic liquid

Green Chemistry

Volumn 4, Issue 5, 2002, Pages 461-463

  Hagiwara, Hisahiro ^a   Sayuri, Tsuji ^a   Okabe, Tomoyuki ^a   Hoshi, Takashi ^a   Suzuki, Toshio ^a   Suzuki, Hiromasa ^a   Shimizu, Ken Ichi ^a   Kitayama, Yoshie ^a  

^a NIIGATA UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 57249088483     PISSN: 14639262     EISSN: None     Source Type: Journal    
DOI: 10.1039/b201900k     Document Type: Article

References (17)

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17. 6 (1 mL) was stirred at 80°C for 2 h under nitrogen atmosphere. The product was extracted 15 times with diethyl ether by vigorous stirring followed by decantation of the upper ether layer. Evaporation of the combined organic layers and subsequent medium pressure LC purification of the residue (eluent: AcOEt-n-hexane = 1:3) afforded the 5-ketoaldehyde 6 (110 mg, 49%) as a mixture of 1:1 diastereomers. The ionic liquid layer was heated at 80°C for 1 h before subsequent re-use.