Chiral DNA Gyrase Inhibitors. 3. Probing the Chiral Preference of the Active Site of DNA Gyrase. Synthesis of 10-Fluoro-6-methyl-6,7-dihydro-9-piperazinyl- 2<i>H</i>-benzo[<i>a</i>]quinolizin-20-one-3-carboxylic Acid Analogues
作者:Robert A. Fecik、Pratik Devasthale、Segaran Pillai、Ali Keschavarz-Shokri、Linus Shen、Lester A. Mitscher
DOI:10.1021/jm0401356
日期:2005.2.1
R-6-methyl-6,7-dihydro-2H-benzo[a]quinolizin-2-one-3-carboxylic acids (12 and 22) were synthesized by an unambiguous route from optically active norephedrines, and their antibacterial potencies were measured. Against Gram-negative microorganisms and DNA gyrase a preference for S-absolute configuration was found whereas R-absolute stereochemistry was more active against Gram-positives. These results are in
One Pot Synthesis Of 3,4-Disubstituted 1-Alkyl-4<i>H</i>-1,2,4-Triazol-1-Ium Salts
作者:J. H. Teles、K. Breuer、D. Enders、H. Gielen
DOI:10.1080/00397919908085727
日期:1999.1.1
Reaction of N-alkyl-N-formyl hydrazines 1 with isolated or ia situ generated imidoyl chlorides 3 is an efficient method for the synthesis of the hitherto hardly accessible 3,4-disubstituted 1-alkyl-4H- 1,2,4-triazol-1-ium salts 4,6.