A series of novelthioglycosidederivativescontaining 4(3H)‐quinazolinone was designed and synthesized from 2‐chloromethyl‐quinazolin‐4(3H)‐ones and 1‐thioglycose. Several 2‐chloromethyl‐quinazolin‐4(3H)‐ones were synthesized on refluxing with 2‐(chloroacetylamino)‐benzoic acid and arylamines in acetonitrile. All of the novel compounds were characterized by IR, 1H NMR spectra and elemental analysis
由2-氯甲基喹唑啉-4-(3 H)-酮和1-硫代糖合成了一系列含有4(3 H)-喹唑啉酮的新型硫代糖苷衍生物。与2-(氯乙酰氨基)-苯甲酸和芳胺在乙腈中回流,合成了几个2-氯甲基-喹唑啉-4-(3 H)-1 。所有新化合物均通过IR,1 H NMR光谱和元素分析进行了表征。化合物7b,8b和8c的结构已通过X射线衍射分析确定。
Facile Synthesis of 1,2-<i>trans</i>-Nitrophenyl-1-Thioglycopyranosides
作者:Hugues Driguez、Wieslaw Szeja
DOI:10.1055/s-1994-25704
日期:——
1,2-trans-2-Nitro-, 4-nitro- and 2,4-dinitrophenyl-1-thioglycopyranosides were synthesized in high yield by condensation of per-O-acetyl-1-thioglucose with the appropriate nitro- or dinitrofluorobenzene in the presence of potassium carbonate. The pseudothiourea precursor was also used under these coupling conditions. 1,2-trans-4-Nitrophenyl-1-thioglycosides derived from β-D-galactose, β-D-xylose, α-L-arabinose and maltose were also obtained in good yield.
Stereoselective synthesis of thioxylooligosaccharides from S-glycosyl isothiourea precursors
作者:Farid M Ibatullin、Konstantin A Shabalin、Janne V Jänis、Stanislav I Selivanov
DOI:10.1016/s0040-4039(01)00775-4
日期:2001.7
A stereoselective synthesis of thioxylo-di-, -tri-, -tetra- and -penta-saccharides from S-glycosyl isothiourea precursors is described. The synthesis was performed starting from 2,3,4-tri-O-acetyl-beta -D-xylopyranosyl isothiouronium bromide using a triethylamine promoted reaction with 1,2,3-tri-O-benzoyl-4-O-lrifluoromethanesuIphonyl-beta -L-arabinopyranose. The resulting 4-thioxylobisse was then converted into the corresponding isothiouroniurn bromide and used for the synthesis of 4,4 ' -dithioxylotriose. Higher homologues of the series and their alpha -methyl glycosides were also prepared. (C) 2001 Elsevier Science Ltd. All rights reserved.