130851-07-9Relevant academic research and scientific papers
Synthesis and Absorption Spectra of 2-Substituted 5,8-Dimethoxy-4H-1-benzothiopyran-4-one 1,1-Dioxides
Watanabe, Shigeru,Nakazumi, Hiroyuki,Akagi, Nobuo,Maeda, Katsumi,Kitao, Teijiro
, p. 1241 - 1244 (2007/10/02)
2,3-Dibromo-5,8-dimethoxy-4H-1-benzothiopyran-4-one (thiochromone) 1,1-dioxide which was a starting material to prepare sulfone analogues of 1,4-naphthoquinone dyes was easily prepared from 5,8-dimethoxythiochroman-4-one by oxidation and bromination.The r
