Grapheneoxide (GO) has been found to be highly efficient and recyclable carbocatalyst for the benign construction of heterocyclic molecule 1,4-benzothiazine from 2-aminothiophenol and 1,3-dicarbonyl compound. A vast range of highly functionalized 1,4-benzothiazine derivatives has been synthesized constituting a general and sustainable protocol. It is proposed that the large surface area of GO nanosheet
Synthesis of 6-halogenated 4<i>H</i>-1,4-benzothiazines
作者:R. R. Gupta、Rakesh Kumar、R. K. Gautam
DOI:10.1002/jhet.5570210628
日期:1984.11
The synthesis of 6-halogenated4H-1,4-benzothiazines is reported by the condensation and oxidative cyclization of 4-substituted 2-aminobenzenethiols (I, R = Cl, Br) with β-diketones in presence of DMSO. The ir, nmr and mass spectral studies are included. 4-Substituted 2-aminobenzenethiols were also prepared by an improved and direct method.
在DMSO存在下,通过β-二酮对4-取代的2-氨基苯硫醇(I,R = Cl,Br)的缩合和氧化环化反应,报道了6-卤代4 H -1,4-苯并噻嗪的合成。包括红外,核磁共振和质谱研究。还通过改进的直接方法制备了4-取代的2-氨基苯硫醇。
Gupta, R. R.; Kumar, M.; Kumar, Rakesh, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1986, vol. 25, # 1, p. 62 - 63
作者:Gupta, R. R.、Kumar, M.、Kumar, Rakesh、Gautam, R. K.
DOI:——
日期:——
GUPTA, R. R.;KUMAR, RAKESH;GAUTAM, R. K., J. HETEROCYCL. CHEM., 1984, 21, N 6, 1713-1715
作者:GUPTA, R. R.、KUMAR, RAKESH、GAUTAM, R. K.
DOI:——
日期:——
Zincke, Justus Liebigs Annalen der Chemie, 1918, vol. 416, p. 103