Benzo[1,2-<i>c</i>:3,4-<i>c</i>']bis[1,2,5]selenadiazole, [1,2,5]selenadiazolo-[3,4-<i>e</i>]-2,1,3-benzothiadiazole, furazanobenzo-2,1,3-thiadiazole, furazanobenzo-2,1,3-selenadiazole and related heterocyclic systems
作者:Catherine M. Cillo、Timothy D. Lash
DOI:10.1002/jhet.5570410616
日期:2004.11
The first synthesis of benzo[1,2-c:3,4-c']bis[1,2,5]selenadiazole has been developed starting from commercially available 4-nitrobenzo-2,1,3-selenadiazole. Improved syntheses of the related heterocycles [1,2,5]selenadiazolo[3,4-e]-2,1,3-benzothiadiazole, furazanobenzo-2,1,3-thiadiazole and furazanobenzo-2,1,3-selenadiazole are also reported.
苯并[1,2- c:3,4- c ']双[1,2,5]硒代二唑的第一种合成方法是从市售的4-硝基苯并-2,1,3-硒代二唑开始的。相关杂环[1,2,5] selenadiazolo [3,4- e ] -2,1,3-苯并噻二唑,呋喃并呋喃苯并-2,1,3-噻二唑和呋喃并佐苯并-2,1,3-塞伦二唑的改进合成方法是也有报道。
Furazan ring opening upon treatment of benzofurazan with ethanolamine to yield quinoxalines
作者:V. A. Samsonov
DOI:10.1007/s11172-007-0400-x
日期:2007.12
Heating of benzofurazans with ethanolamine in the presence of catalytic amount of p-toluenesulfonic acid leads to quinoxalines.
Synthesis of Functional Derivatives of Benzodifurazan
作者:V. A. Samsonov、Yu. V. Gatilov、A. O. Bryzgalov
DOI:10.1134/s1070428024020052
日期:2024.2
Abstract Benzodifurazan reacts with 1,3-dibromo-5,5-dimethylhydantoin in sulfuric acid to form 5-bromo-4,5-dihydrobenzo[1,2-c:3,4-c']bis([1,2,5]oxadiazol)-4-ol (A). The structure of the product was established by X-ray diffraction analysis. It was found that compound A exhibits properties of epoxides: it readily takes up nucleophiles to form alcohols, whose reaction with p-toluenesulfonyl chloride
摘要 苯并二呋喃与 1,3-二溴-5,5-二甲基乙内酰脲在硫酸中反应生成 5-溴-4,5-二氢苯并[1,2- c :3,4- c ']bis([1,2,5 ]恶二唑)-4-醇(A)。通过X射线衍射分析确定了产物的结构。结果发现,化合物A表现出环氧化物的性质:它很容易与亲核试剂形成醇,在四丁基溴化铵和氢氧化钠存在下,在苯中与对甲苯磺酰氯反应,得到苯并二呋嗪的功能衍生物。用碱 [Ca(OH) 2 ] 处理后,化合物A转化为 1a,7b-二氢氧基[2',3':5,6]苯并[1,2- c :3,4- c ']bis( [1,2,5]恶二唑)。
Goldschmidt; Strauss, Chemische Berichte, 1887, vol. 20, p. 1610
作者:Goldschmidt、Strauss
DOI:——
日期:——
1116. Heterocyclic rearrangements. Part IV. Furoxano- and furazano-benzofuroxan
作者:A. J. Boulton、A. C. Gripper Gray、A. R. Katritzky