Baylis–Hillman reaction assisted parallel synthesis of 3,5-disubstituted isoxazoles and their in vivo bioevaluation as antithrombotic agents
摘要:
The solution-phase parallel synthesis involving reactions of Baylis-Hillman products of 3-substituted -5-isoxazolecarb-aldehydes with nucleophiles and their in vivo antithrombotic evaluations are described along with the results of in vitro platelet aggregation inhibition assay of a few compounds. Results of the detailed evaluation of one of the compounds as an inhibitor of platelet aggregation are also presented. (C) 2004 Elsevier Ltd. All rights reserved.
3-Aryl-5-isoxazolecarboxaldehyde undergoes fast Baylis-Hillman reaction with a variety of activated alkenes to yield the corresponding adducts in excellent yields. Some of the Baylis-Hillman adducts reported herein have been subsequently modified to obtain isoxazole substituted pyrazolin-3-ones and γ-butyrolactones.
The solution-phase parallel synthesis involving reactions of Baylis-Hillman products of 3-substituted -5-isoxazolecarb-aldehydes with nucleophiles and their in vivo antithrombotic evaluations are described along with the results of in vitro platelet aggregation inhibition assay of a few compounds. Results of the detailed evaluation of one of the compounds as an inhibitor of platelet aggregation are also presented. (C) 2004 Elsevier Ltd. All rights reserved.