Efficient microwave-assisted formation of functionalized 2,5-dihydropyrroles using ruthenium-catalyzed ring-closing metathesis
作者:Daniela Balan、Hans Adolfsson
DOI:10.1016/j.tetlet.2004.02.100
日期:2004.4
A rapid method for the formation of functionalized 2,5-dihydropyrroles using ruthenium-catalyzed ring-closing metathesis under microwave irradiation is presented. The diene substrates were efficiently prepared from aza-Baylis-Hillman adducts. (C) 2004 Elsevier Ltd. All rights reserved.
Selective Formation of α-Methylene-β-amino acid Derivatives through the Aza Version of the Baylis−Hillman Reaction
作者:Daniela Balan、Hans Adolfsson
DOI:10.1021/jo0158635
日期:2001.9.1
Application of the ring-closing metathesis to the formation of 2-aryl-1H-pyrrole-3-carboxylates as building blocks for biologically active compounds
kinetics on the RCM. After an aromatization step, this methodology allowed for an efficient generation of variously substituted and unprecedented 2-aryl-1H-pyrrole-3-carboxylates in good yields and cost-effectiveness. The resulting molecules might serve as key buildingblocks for the generation of CNS-oriented compound libraries.
Titanium Isopropoxide as Efficient Catalyst for the Aza-Baylis−Hillman Reaction. Selective Formation of α-Methylene-β-amino Acid Derivatives
作者:Daniela Balan、Hans Adolfsson
DOI:10.1021/jo0163952
日期:2002.4.1
formation of alpha-methylene-beta-amino acid derivatives is achieved using the aza version of the Baylis-Hillman protocol. The products are readily formed in a three-component one-pot reaction between arylaldehydes, sulfonamides, and alpha,beta-unsaturated carbonyl compounds. The reaction is efficientlycatalyzed by titanium isopropoxide and 2-hydroxyquinuclidine in the presence of molecular sieves. The