Structural elucidation of propargylated products of 3-substituted-1,2,4-triazole-5-thiols by NMR techniques
作者:Preeti M. Chaudhary、Sayalee R. Chavan、M. Kavitha、Shailaja P. Maybhate、Sunita R. Deshpande、Anjali P. Likhite、P. R. Rajamohanan
DOI:10.1002/mrc.2307
日期:2008.12
namely, a mono S‐propargyl and two S,N‐dipropargyl regioisomers, arising from N1/N2 substitution, were isolated and characterized. Unambiguous structural elucidation of the regioisomers of S,N‐dipropargyl derivatives was achieved by means of 13C1H HMBC technique. The proportion of the regioisomers was found to vary with the substituent on the 1,2,4‐triazole thiols. No product corresponding to N4 substitution
3-取代-1,2,4-三唑-5-硫醇的丙炔化反应主要以硫酮互变异构体形式存在,旨在合成不同的杂环并研究其生物活性。分离并表征了由 N1/N2 取代产生的三种不同产物,即单 S-炔丙基和两种 S,N-二炔丙基区域异构体。通过 13C1H HMBC 技术实现了对 S,N-二炔丙基衍生物区域异构体的明确结构阐明。发现区域异构体的比例随 1,2,4-三唑硫醇上的取代基而变化。从所进行的任何反应中均未分离出对应于 N4 取代的产物。版权所有 © 2008 John Wiley & Sons, Ltd.