The symmetrical porphyrazine with annulated six membered rings
摘要:
Tetrakis(cyclohexylpyrazino)porphyrazinato magnesium(II) with annulated six membered rings has been prepared by two different methods. In Method A: cyclotetramerization of 2,3-dicyano-5,6-cyclohexanopyrazine (1) in the presence of Mg(OPr)(2) in n-propanol afforded the tetrakis(cyclohexylpyrazino)porphyrazinato magnesium(II) (2). In Method B: selenodiazole rings on the periphery of tetrakis(selenodiazole)porphyrazinato magnesium(II) were opened by the action of H2S to yield the vicinal diamino functionalities. The ring closure of the vicinal diamino groups with 1,2-cyclohexanedione afforded the tetrakis(cyclohexylpyrazino) porphyrazinato magnesium(II) (2). (C) 2009 Elsevier Ltd. All rights reserved.
Direct and catalytic synthesis of quinoxaline derivatives from epoxides and ene-1,2-diamines
摘要:
We describe here a new synthesis of quinoxaline derivatives by a Bi-catalyzed oxidative coupling of epoxides and a ene-1.2-diamines. (C) 2002 Elsevier Science Ltd. All rights reserved.
A new facile, efficient synthesis and structure peculiarity of quinoxaline derivatives with two benzimidazole fragments
作者:Vakhid A. Mamedov、Nataliya A. Zhukova、Victor V. Syakaev、Aidar T. Gubaidullin、Tat'yana N. Beschastnova、Dil'bar I. Adgamova、Aida I. Samigullina、Shamil K. Latypov
DOI:10.1016/j.tet.2012.10.045
日期:2013.1
A highly efficient and versatile method for the synthesis of quinoxalinederivatives with two benzimidazole fragments have been developed on the basis of the ring contraction of 3-(benzimidazo-2-yl)quinoxalin-2(1H)-one with 1,2-diaminobenzene and its various types of substituted and condensed derivatives. Owing to the inter- and intramolecular processes, involving self association, proton exchange
基于3-(苯并咪唑-2-基)喹喔啉-2(1 H)-与1,2-的环收缩,已开发出一种高效且通用的具有两个苯并咪唑片段的喹喔啉衍生物的合成方法。二氨基苯及其各种类型的取代和稠合衍生物。由于分子间和分子内过程,涉及桥联和相邻碳原子的大多数双-苯并咪唑基喹喔啉信号的几种形式之间的自缔合,质子交换,构象和/或互变异构交换,且NMR光谱中的苯并咪唑片段变宽。苯并咪唑片段与分子的喹喔啉核心之间的共轭作用比喹喔啉衍生物(10c)与其噻二唑[ f ]-(17)和吡咯并[ a ]-(19)环化了衍生物,导致整个分子的平面度更大。
Ried, Walter; Lee, Chiu-Huei; Bats, Jan W., Liebigs Annalen der Chemie, 1989, p. 497 - 500
作者:Ried, Walter、Lee, Chiu-Huei、Bats, Jan W.
DOI:——
日期:——
Direct and catalytic synthesis of quinoxaline derivatives from epoxides and ene-1,2-diamines
作者:Sylvain Antoniotti、Elisabet Duñach
DOI:10.1016/s0040-4039(02)00715-3
日期:2002.5
We describe here a new synthesis of quinoxaline derivatives by a Bi-catalyzed oxidative coupling of epoxides and a ene-1.2-diamines. (C) 2002 Elsevier Science Ltd. All rights reserved.
The symmetrical porphyrazine with annulated six membered rings
作者:Hilal Onay、Burak Esat、Ramazan Öztürk
DOI:10.1016/j.poly.2009.12.012
日期:2010.3
Tetrakis(cyclohexylpyrazino)porphyrazinato magnesium(II) with annulated six membered rings has been prepared by two different methods. In Method A: cyclotetramerization of 2,3-dicyano-5,6-cyclohexanopyrazine (1) in the presence of Mg(OPr)(2) in n-propanol afforded the tetrakis(cyclohexylpyrazino)porphyrazinato magnesium(II) (2). In Method B: selenodiazole rings on the periphery of tetrakis(selenodiazole)porphyrazinato magnesium(II) were opened by the action of H2S to yield the vicinal diamino functionalities. The ring closure of the vicinal diamino groups with 1,2-cyclohexanedione afforded the tetrakis(cyclohexylpyrazino) porphyrazinato magnesium(II) (2). (C) 2009 Elsevier Ltd. All rights reserved.