摘要 以邻甲基苯胺到5与各种芳香族碳酸为原料合成了新型5-甲基-3-取代-1,2,4-三唑并[3,4-b]苯并噻唑。得到的产物 6a-e 经元素分析、核磁共振、质谱、红外光谱证实,6e 经 X 射线晶体学研究。化合物6e,C 24 H 16 N 4 S,Mr=392.69,在三斜空间群P 1 中结晶,晶胞参数a =9.713(3) A, b =14.645(4) A, c =15.641(3) A , α =113.17(2)°, β =90.11(2)°, γ =109.29(2)°, V =1908.1(7) A 3 , Z =4, D m =1.366 Mgm -3 。
Synthesis of 4-acetyl-2(3<i>H</i>)-benzothiazolone: Sulfur bioisostere of benzoxazolone allelochemicals
作者:Mariana S. Gerova、Filip E. Svetoslavov、Boris L. Shivachev、Rositsa P. Nikolova、Ognyan I. Petrov
DOI:10.1080/10426507.2017.1321645
日期:2017.8.3
GRAPHICAL ABSTRACT ABSTRACT A multi-step methodology for the synthesis of 4-acetyl-2(3H)-benzothiazolone was developed in order to prepare a new biomimetic analogue of benzoxazolone allelochemicals. The compound was prepared from commercially available o-toluidine in 23% overall yield. The structure of 4-acethyl-2(3H)-benzothiazolone was confirmed by NMR spectroscopy and X-ray crystallography.
图形摘要 摘要 为了制备苯并恶唑酮化感物质的新仿生类似物,开发了用于合成 4-乙酰基-2(3H)-苯并噻唑酮的多步方法。该化合物由市售邻甲苯胺制备,总产率为 23%。4-acethyl-2(3H)-benzothiazolone 的结构由核磁共振光谱和 X 射线晶体学证实。
Exchange amination process for preparing 2-hydrazinobenzothiazoles
申请人:Eli Lilly and Company
公开号:US03937714A1
公开(公告)日:1976-02-10
Improved process for the preparation of 2-hydrazinobenzothiazoles, comprising the reaction of corresponding 2-aminobenzothiazoles with hydrazine in the presence of acid, preferably in a selected solvent.
Synthesis and antioxidant activity of quinolinobenzothiazinones
作者:M. Kumar、Kshitija Sharma、R.M. Samarth、A. Kumar
DOI:10.1016/j.ejmech.2010.07.006
日期:2010.10
A new series of structurally diverse quinolinobenzothiazinones has been synthesized with the annulation of heterocyclic structural pharmacophores. The synthesized quinolinobenzothiazinones have been evaluated for their antioxidant (LPO & GSH) and radical scavenging activities (DPPH and ABTS assays). (C) 2010 Elsevier Masson SAS. All rights reserved.