A Synthesis of a Novel Heterocyclic System: 2H-Furo[3,2-b][1,4]benzo- thiazin-2-one
作者:Wai-Keung Chui、Anton V. Dolzhenko
DOI:10.3987/com-04-10208
日期:——
A synthesis of 3-methyl-2H-furo[3,2-b][1,4]benzothiazin-2-ones (10a,b) is described. o-Aminothiophenols (la,b) undergo condensation with citraconic anhydride followed by cyclization and oxidation of the resulting 2-(3,4-dihydro-2H-1,4-benzothiazin-2-yl)propanoic acids (5) with thionyl chloride gives moderate yield of 10a,b.
描述了 3-甲基-2H-呋喃[3,2-b][1,4]苯并噻嗪-2-酮 (10a,b) 的合成。邻氨基苯硫酚 (la,b) 与柠康酸酐缩合,然后用亚硫酰氯环化和氧化生成的 2-(3,4-二氢-2H-1,4-苯并噻嗪-2-基)丙酸 (5)给出 10a,b 的中等产量。