开发了一种氧化剂促进苯并咪唑鎓烷基化物与烯烃的1,3-偶极环加成反应,用于在温和条件下以中等收率制备4 H-吡咯并[1,2- a ]苯并咪唑衍生物。在合适的氧化剂存在下,最商业上可买到的“正构”烯烃,而不是炔烃或“反常”烯烃,可以成功地用作双极性亲和剂。此外,在该程序中,已证明CrO 3 / Et 3 N是比MnO 2或重铬酸四基吡啶钴(II)更为有效的脱氢剂。
A new approach to pyrrolo[1,2-a]quinoxaline derivatives
作者:Xue-chun Zhang、Wei-yuan Huang
DOI:10.1016/s0040-4039(97)01021-6
日期:1997.7
2-dihydropoly(per)fluoroalkanoate(2) reacted with N-phenacyl benzimidazole bromide(1a–1b),N-acetonyl benzimidazole bromide(1c) and N-ethoxycarbonylmethyl benzimidazole bromide(1d) in DMF to give pyrrolo[1,2-a]quinoxaline derivatives(3ae-3dg) respectively.
Reaction of 1-alkylbenzimidazolium 3-ylides with ethyl 2,2-dihydropolyfluoroalkanoates
作者:Xue-chun Zhang、Wei-yuan Huang
DOI:10.1016/s0040-4020(98)00728-5
日期:1998.10
In the presence of base, ethyl 2,2-dihydropolyfluoroalkanoates(2) reacted with N-phenacyl(1a-1b), N-acetonyl(1c), N-ethoxycarbonylmethyl(1d) and N-(diethylaminocarbonyl-methyl) benzimidazole bromides(le) in DMF to give the corresponding pyrrolo[1,2-a]quinoxaline derivatives (3) respectively. When (2) was reacted with N-cyanomethyl benzimidazole bromides (1f-1g), fluoroalkyl substituted I-aryl pyrrole derivatives (4) were formed as the major products. (C) 1998 Elsevier Science Ltd. All rights reserved.
Gandasegui, M. Teresa; Alvarez-Builla, Julio, Heterocycles, 1990, vol. 31, # 10, p. 1801 - 1809
作者:Gandasegui, M. Teresa、Alvarez-Builla, Julio
DOI:——
日期:——
Sepulveda-Arques, Jose; Arbiol, Eva Romero; Rosende, M. Eugenia Gonzalez, Recueil des Travaux Chimiques des Pays-Bas, 1990, vol. 109, # 7/8, p. 410 - 412
作者:Sepulveda-Arques, Jose、Arbiol, Eva Romero、Rosende, M. Eugenia Gonzalez、Lopez-Rodriguez, Matias、Afonso, Ricardo Perez
DOI:——
日期:——
SEPULVEDA-ARQUES, JOSE;ARBIOL, EVA ROMERO;ROSENDE, M. EUGENIA GONZALEZ;LO+, REC. TRAV. CHIM. PAYS-BAS, 10,9,(1990) N-8, C. 410-412
作者:SEPULVEDA-ARQUES, JOSE、ARBIOL, EVA ROMERO、ROSENDE, M. EUGENIA GONZALEZ、LO+