Baylis–Hillman reaction promoted by a recyclable protic-ionic-liquid solvent–catalyst system: DABCO–AcOH–H2O
摘要:
A recyclable protic-ionic-liquid solvent-catalyst system, DABCO-AcOH-H2O, has been developed and used in the Baylis-Hillman reaction of aromatic aldehydes, aliphatic aldehydes, and cinnamaldehydes with acrylates and acrylonitrile, showing comparable performance to free DABCO in traditional solvents. The DABCO-AcOH-H2O solvent-catalyst system could be reused for at least five times without significant loss of activity. (C) 2009 Elsevier Ltd. All rights reserved.
Regioselective Palladium(II)-Catalyzed Desulfitative Heck-Type Reaction: Access to α-Benzyl-β-keto Esters from Baylis-Hillman Adducts and Sodium Sulfinates
作者:Kommu Nagaiah、Kammari Bal Raju、Vellakkaran Mari
DOI:10.1055/s-0033-1339663
日期:——
A new palladium(II)-catalyzed desulfitative Heck-Type arylation from sodium arenesulfinates and Baylis-Hillman adducts for the synthesis of highly functionalized alpha-benzyl-beta-keto ester derivatives in good to excellent yields has been developed. This methodology is simple and mild, it can utilize halogen bearing building blocks, and it has excellent regioselectivity.