Regioselective Synthesis of 2-Substituted [1,2,4]Triazolo[5,1-b][1,3]thiazin-7-ones by Heteropolyacids
摘要:
2-Substituted [1,2,4]triazolo[5,1-b][1,3]thiazin-7-ones 3 were synthesized via regioselective cyclization of 4H-[1,2,4]triazol-3-ylsulfanyl-acrylic acids 2 in the presence of catalytic amounts of heteropolyacids at room temperature in very good yields and rates.
Sulfuric Acid: A Mild Catalyst for the Regioselective Synthesis of 2-Substituted [1,2,4]Triazolo[5,1- b][1,3]thiazin-7-ones
作者:Majid M. Heravi、Nasser Montazeri、Mohammad Rahimizadeh、Mehdi Bakavoli、Mitra Ghassemzadeh
DOI:10.1007/s007060170037
日期:2001.10
A facile and regioselective synthesis of 2-substituted [1,2,4]triazolo[5,1- b ][1,3]thiazin-7-ones by action of sulfuric acid on (4 H -[1,2,4]triazol-3-ylsulfanyl)-acrylic acids is described.
的一种简便和区域选择性合成2-取代的[1,2,4]三唑并[5,1- b ] [1,3]噻嗪-7-酮由(4硫酸的作用 ħ - 1,2,4- [描述了[三唑-3-基硫烷基]-丙烯酸。
7H-[1,2,4]Triazolo[5,1-b][1,3]thiazin-7-ones by deamination cyclization of S-acrylates of 4-amino-3(3H)-1,2,4-triazolethiones
作者:Ned D. Heindel、Jack R. Reid
DOI:10.1021/jo01300a043
日期:1980.6
Montazeri; K. Pourshamsian; A. Divsalar, Asian Journal of Chemistry, 2012, vol. 24, # 6, p. 2802 - 2804