Synthesis of<i>N</i>-[1-(2-Hydroxyethyl)-1<i>H</i>-tetrazol-5-yl]-<i>N</i>-methylhydrazine as Polymeric Precursor
作者:Klaus Banert、Thomas M. Klapötke、Stefan M. Sproll
DOI:10.1002/ejoc.200800764
日期:2009.1
nitrogen-rich polymer was formed from the reaction of hexamethylene diisocyanate and N-[1-(2-hydroxyethyl)-1H-tetrazol-5-yl]-N-methylhydrazine (3) monomers. Compound 3 was synthesized by a nucleophilic substitution of the methylated sulfur atom of 4-[2-(acetoxy)ethyl]-2-methylthiosemicarbazide (10) with sodium azide and final deprotection of the formed N-[1-2-(acetoxyethyl)-1H-tetrazol-5-yl]-N-methylhydrazine
Semisynthetic aminoglycoside antibacterials. Part 10. Synthesis of novel 1-N-aminoalkoxycarbonyl and 1-N-aminoalkylcarboxamido derivatives of sisomicin, gentamicin B, gentamicin C1a, and kanamycin A
作者:Alan K. Mallams、James B. Morton、Paul Reichert
DOI:10.1039/p19810002186
日期:——
of sisomicin, 5-epi-sisomicin, gentamicinB, gentamicin C1a, and kanamycin A have been converted into a series of 1-N-alkoxycarbonyl, 1-N-alkoxycarbonyl, 1-N-carboxamido, 1-N-alkylcarboxamido, and 1-N-aminoalkylcarboxamido derivatives. Representative thio-analogues have also been prepared. 13C N.m.r. studies have revealed that these novel semisyntheticaminoglycosides have different solution conformations
西索米星的适当保护的衍生物,5-外延-sisomicin,庆大霉素B,庆大霉素Ç 1A,和卡那霉素阿已被转换成一系列1- Ñ烷氧基羰基,1- Ñ烷氧基羰基,1- Ñ甲酰,1- Ñ -烷基甲酰胺基和1- N-氨基烷基甲酰胺基衍生物。代表性的硫代类似物也已制备。13 C Nmr研究表明,相对于其衍生的母体氨基糖苷,这些新型的半合成氨基糖苷在C-6–O糖苷键方面具有不同的溶液构象。