OKAFOR C. O., J. HETEROCYCL. CHEM., 1980, 17, NO 7, 1587-1592
作者:OKAFOR C. O.
DOI:——
日期:——
Synthesis of Benzothiazinophenothiazine Derivatives and their Antimicrobial Screening
作者:Emmanuel O Adekola、Benjamin E Ezema、Jude I Ayogu、David I Ugwu、Chidimma G Ezema、Abuekwu P Nwasi、Christian O Ike
DOI:10.13005/ojc/300406
日期:2014.12.31
The synthesis of benzothiazinophenothiazine derivatives from simple heterocyclic compounds was thoroughly investigated. The intermediate, 6-chloro-5H-benzo[a]phenothiazin-5-one was afforded by the condensation of 2-aminothiophenol with 2,3-dichloro-1, 4-naphthoquinone in an alkaline medium. Further condensation of the intermediate with 2,4-diamino-6-hydroxypyrimidine-5-thiol obtained by alkaline hydrolysis of 2,4-diamino-6-hydroxy-5-thiacyanatopyrimidine gave 7-amino-9-hydroxy-6-8,diazabenzo[a][1,4]benzothiazino[3,2-c]phenothiazine. However, facile acid-catalyzed synthesis of four other benzothiazinophenothiazine ring systems was accomplished with improved yield and lesser reaction time. The Structural confirmation was done using UV-Visible spectroscopy, FT-IR, 1H and 13C-NMR and elemental analysis. The synthesized compounds were screened against some micro-organisms and the results showed that the complex derivatives were significantly active against the microorganisms.
Studies in the heterocyclic series. XVIII. Utilization of 4-aminopyrimidine chemistry in 1,4,7,9-tetraazabenzo[<i>b</i>]phenothiazine synthesis
作者:Charles O. Okafor
DOI:10.1002/jhet.5570170747
日期:1980.11
The synthesis of 1,4,7,9-tetraazabenzo[b]phenothiazine ring system from 4-aminopyrimidine is reported. This new heterocyclic ring was obtained by converting a 4-aminopyrimidine to the corresponding 5-thiocyanato derivative followed by hydrolysis and subsequent treatment with 2,3-dichloroquinoxaline. Several derivatives were obtained by using suitable substituted starting materials. Nitration with mixed
据报道由4-氨基嘧啶合成1,4,7,9-四氮杂苯并[ b ]吩噻嗪环系统。通过将4-氨基嘧啶转化为相应的5-硫氰酸根衍生物,然后水解并随后用2,3-二氯喹喔啉处理,获得了该新的杂环。通过使用合适的取代起始原料获得了几种衍生物。用硝酸和硫酸混合硝化得到相应的13-硝基衍生物。光谱分析与分配的结构一致。