Rapid synthesis of 2,5-disubtituted 1,3,4-thiadiazoles under microwave irradiation
作者:Mounim Lebrini、Fouad Bentiss、Michel Lagrenée
DOI:10.1002/jhet.5570420538
日期:2005.7
The one pot, three-components condensation of aromatic aldehydes, hydrazine and sulfur in ethanol undermicrowaveirradiation provided symmetrically 3,5-disubstituted 1,3,4-thiadiazoles in high yields and good purity. This reaction must be conducted under pressure of hydrogen sulfide produced in-situ. The structure of the compounds was confirmed by 1H, 13C NMR, MS and elemental analysis.
在微波辐射下,一锅三组分的芳香醛,肼和硫在乙醇中的缩合反应可对称地提供3,5-二取代的1,3,4-噻二唑,产率高且纯度高。该反应必须在原位产生的硫化氢的压力下进行。化合物的结构通过1 H,13 C NMR,MS和元素分析确认。
New crown compounds containing a 1,3,4-thiadiazole moiety: Synthesis and crystal structure
The syntheses of new macrocyclic compounds are described. The 2,5-bis(hydroxyphenyl)-1,3,4-thiadiazole reacts with allyl bromide to give the corresponding allyloxy derivative. The allyl is used to functionalize the ortho position by means of a Claisen rearrangement under microwave irradiation. New 2,5-dihydroxyphenyl-1,3,4-thiadiazoles are obtained, which are converted into macrocyclic polyethers.
描述了新的大环化合物的合成。2,5-双(羟苯基)-1,3,4-噻二唑与烯丙基溴反应生成相应的烯丙氧基衍生物。烯丙基通过微波辐射下的克莱森重排用于官能化邻位。获得新的2,5-二羟基苯基-1,3,4-噻二唑,将其转化为大环聚醚。新的大环化合物的结构通过1 H,13 C NMR和质谱证实。已经确定了2,5-双(2-烯丙氧基苯基)-1,3,4-噻二唑的晶体结构。J.杂环化学,(2009)。