Regiospecific Michael additions with 2-aminopurines
摘要:
N-9 alkylated materials are the sole products obtained from extended reaction of 2-aminopurines (potential guanine precursors) with Michael acceptors. This was used as the basis for a highly regioselective synthesis of famciclovir. the oral form of the anti-herpesvirus agent penciclovir.
[EN] 4,4-DISUBSTITUTED-1,4-DIHYDROPYRIMIDINES AND THE USE THEREOF AS MEDICAMENTS FOR THE TREATMENT OF HEPATITIS B<br/>[FR] 1,4-DIHYDROPYRIMIDINES 4,4-DISUBSTITUÉES ET LEUR UTILISATION EN TANT QUE MÉDICAMENTS POUR LE TRAITEMENT DE L'HÉPATITE B
申请人:JANSSEN R & D IRELAND
公开号:WO2013102655A1
公开(公告)日:2013-07-11
Inhibitors of HBV replication of formula (I) including stereochemically isomeric forms, and salts, hydrates, solvates thereof, wherein R1-R5, B and Z have the meaning as defined herein. The present invention also relates to processes for preparing said compounds, pharmaceutical compositions containing them and their use, alone or in combination with other HBV inhibitors, in HBV therapy.
and useful synthons for the synthesis of Famvir®, an antiviral drug. Simple methods for the preparation of 2-haloalkylidenemalonates are not available. We have developed a novel and non-cumbersome methodology for the synthesis of dialkyl 2-(2-haloethylidene)malonates, cyanoacetates and halocrotonates by one carbon extension of dialkyl (2-alkoxymethylene)malonates, cyanoacetates and 3-alkoxyacrylates with
Regiospecific Michael additions with 2-aminopurines
作者:Graham R. Geen、Peter M. Kincey、Bernadette M. Choudary
DOI:10.1016/s0040-4039(00)61326-6
日期:1992.8
N-9 alkylated materials are the sole products obtained from extended reaction of 2-aminopurines (potential guanine precursors) with Michael acceptors. This was used as the basis for a highly regioselective synthesis of famciclovir. the oral form of the anti-herpesvirus agent penciclovir.