Coumarin derivatives as protease inhibitors and antiviral agents
The present invention relates to novel coumarin derivatives and related compounds which potently inhibit the HIV aspartyl protease blocking HIV infectivity. The coumarin derivatives are useful in the development of therapies for the treatment of viral infections and diseases, including AIDS. The present invention is also directed to methods of synthesis of multifunctionalized coumarins and of related structures.
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(2008/06/13)
Alkylation of 4-Hydroxycoumarins by Ketone Mannich Bases. Synthesis of 4-Hydroxy-2-oxo-3-(3-oxoalkyl)-2H-1-benzopyrans
The reaction of 4-hydroxycoumarins with 2-dimethylaminoethyl ketones or with dimethylamine + vinyl ketones affords 4-hydroxy-2-oxo-3-(3-oxoalkyl)-2H-1-benzopyrans which undergo carbonyl olefination with methylenetriphenylphosphorane to give 3-(3-butenyl)-