An unexpected and efficient direct nucleophilic C-4 hydroxy substitution on 2-methoxy- and 2-methylthio-4(3)-pyrimidinones bearing a diethylamino moiety on the C-6 side chain
The unexpected and efficient direct nucleophilic C-4 hydroxy (oxo) substitution by sodium alkoxides on 2-methoxy- and 2-methylthio-4(3H)-pyrimidinones bearing a diethylamino moiety on the C-6 side chain is reported. An unprecedented tandem C-6 side chain Hofmann-like elimination /C-4 pyrimidinone substitution is also reported. This provides a good method for the synthesis of new C-6 vinyl cytosine
A new and efficient synthesis of substituted 6-[(2′-Dialkylamino)ethyl] pyrimidine and 4- N,N -Dialkyl-6-vinyl-cytosine derivatives and evaluation of their anti-Rubella activity
New 6[(2'-dialkylamino)ethyl]-4(3H)-pyrimidinones were prepared by a multistep procedure starting from acetone dicarboxylic acid diethyl ester and urea derivatives. These compounds were used as starting materials to obtain 4-N,N-dialkyl-6-vinyl-pyrimidine derivatives by an unprecedented tandem C-6 side chain Hofmann-like elimination/C-4 pyrimidinone substitution. Among the new derivatives obtained, various compounds show anti-Rubella activity. The inhibition of HIV-1 Reverse Transcriptases (RT), from both wild type and modified viruses, is also reported. (C) 2002 Elsevier Science Ltd. All rights reserved.