31001-24-8Relevant articles and documents
Glycosyl isoxazole compound, preparation method thereof and bactericide
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Paragraph 0178-0181; 0185, (2021/04/07)
The invention relates to the technical field of bactericidal materials, and particularly relates to a glycosyl isoxazole compound, a preparation method thereof and a bactericide. The glycosyl isoxazole compound has a structural general formula shown in the description, wherein R1 is selected from any one of substituted or unsubstituted aromatic groups, and R2 is selected from any one of H, acetyl, benzyl and propargyl. According to the invention, a natural saccharide compound is adopted as the framework, the safety is provided, the toxicity is low, the selectivity is high, residue is not easily generated, the environmental compatibility is good, the active group isoxazole structure is further introduced, and the obtained glycosyl isoxazole compound has advantages of safety, high efficiency, low toxicity, low residue, broad spectrum, resistance generation resistance resistance resistance generation resistance and the like, and further has excellent bactericidal activity.
Synthesis, Structure Elucidation and Reactions of trans-Fused 3,6-Anhydro-1,2-O-isopropylidene-α-D-hexofuranoses
Reckendorf, Wolfgang Meyer zu,Schultz, Norbert,Kreimeier, Richard
, p. 337 - 346 (2007/10/02)
Unexpectedly, the reaction of 1,2-O-isopropylidene-5,6-di-O-(p-tolylsulfonyl)-α-D-allofuranose (7) with KCN in ethanol yielded the first trans-fused 3,6-anhydro-hexofuranose 10.Besides by spectroscopic evidence the structure of 10 was proved by transformation to the tosylated acetal 13 which could also be obtained via an independent route.Further reactions of 10 all resulted in opening of the strained ring system yielding acetals (18-22).By blocking the 5-position with the alkali-resistant ether function this cyclization could also be achived by more common reagents like NaH in DMF (32). - By applying this procedure to the corresponding α-D-galactofuranose derivative 41 3,6-anhydro-α-D-galactofuranose 42 could also be obtained albeit in low yield.For comparison purposes the 3,6-anhydro-α-D-gulo derivative 47 was synthesized from easily accessible 44. - Key Words: Carbohydrates / Hexofuranoses / 3,6-Anhydro-D-hexofuranoses