An asymmetric approach to coumarin anticoagulants via hetero-Diels–Alder cycloaddition
作者:Giancarlo Cravotto、Gian Mario Nano、Giovanni Palmisano、Silvia Tagliapietra
DOI:10.1016/s0957-4166(01)00124-0
日期:2001.4
We have developed a general, two-step protocol for the synthesis of chiral non-racemic coumarin anticoagulants (e.g. warfarin. coumachlor and acenocoumarol). This approach features a one-pot three-component tandem Knoevenagel-hetero-Diels-Alder reaction between in situ generated 3-arylidene-2,4-chromanediones and iso-propenyl ether derived from (-)-menthol. (C) 2001 Elsevier Science Ltd. All rights reserved.
New selective cyclooxygenase-2 inhibitors from cyclocoumarol: Synthesis, characterization, biological evaluation and molecular modeling
In this work, a serie of cyclocoumarol derivatives was designed, synthesized, characterized and studied for their potentialities as selective inhibitors of COX-2. All target compounds have been screened for their anti-inflammatory activity by the assay of PGE2 production. Among them, compound 5d exhibited the most potent inhibitory activity with a PGE2 inhibition compared to NS-398 (79% and 88% respectively)