[EN] 2 -AMINO- 1, 8 -NAPHTHYRIDINE-3 -CARBOXAMIDE DERIVATIVES AS ANTIMICROBIAL AGENTS<br/>[FR] DÉRIVÉS DE 2-AMINO-1,8-NAPHTYRIDINE-3-CARBOXAMIDE UTILISÉS COMME AGENTS ANTIMICROBIENS
申请人:ACTELION PHARMACEUTICALS LTD
公开号:WO2013072882A1
公开(公告)日:2013-05-23
The present invention concerns novel 2-amino-1,8-naphthyridine-3-carboxamide derivatives of formula I, a pharmaceutical antibacterial composition containing them and the use of these compounds in the manufacture of a medicament for the treatment of infections (e.g. bacterial infections). These compounds are useful antimicrobial agents effective against a variety of human and veterinary pathogens including among others Gram-positive and Gram-negative aerobic and anaerobic bacteria.
New acyl anionequivalents bearing a hydroxyl group at the β-position have been developed. Treatment of 3-benzyloxy-1-isocyanopropenes with lithium diisopropylamide (LDA) in THF at −78 °C generated the 1-lithio compounds, which reacted with alkyl halides to afford the corresponding 1-alkylated products in good yields. Acid hydrolysis of these alkylated products followed by hydrogenolysis of the resulting
(E)-4-Alkoxy-2-formylamino-3-butenoic acid esters have been prepared in two steps from 3-alkoxy-1-isocyanopropenes. The method is based on the reaction of 3-alkoxy-1-isocyano-1-lithiopropenes, which can be generated by the treatment of 3-alkoxy-1-isocyanopropenes with LDA in THF at −78 °C, with alkylchlorocarbonates, affording 4-alkoxy-2-isocyano-3-butenoates. These isocyano esters have been easily