取代的吡咯并[2,3- b ]喹喔啉,吡啶并[2,3- b ]吡咯并[2,3- e ]吡嗪,吡啶并[2,3- b ]吡咯并[3,2- e ]吡嗪的区域选择性合成报道了吡啶并[3,4- b ]吡咯并[3,2- e ]吡嗪。可以利用邻二氨基吡啶中两个氨基之间的差异反应性来获得新的区域定义的不对称吡咯并吡咯并吡嗪衍生物。与芳族邻二胺连接的弱给电子甲基或中等吸电子羧基会降低区域选择性,从而获得不对称取代的吡咯并[2,3- b喹喔啉。给出了所得的1-烷基吡咯并吡咯并吡嗪和取代的吡咯并[2,3- b ]喹喔啉衍生物的荧光性质。
An efficient and rapid synthesis of β-carboxamide derivatives using 2,2-dimethyl-2H,4H-1,3-dioxin-4-ones by microwave irradiation
作者:Bruhaspathy Miriyala、John S. Williamson
DOI:10.1016/j.tetlet.2003.08.118
日期:2003.10
A general, efficient and rapidmethod for the synthesis of various β-carboxamide derivatives using microwaveirradiation is described. Excellent isolated yields were obtained in very short reaction times when conventional heating was replaced by microwaveirradiation.
Enamine-Based Domino Strategy for C-Acylation/Deacetylation of Acetoacetamides: A Practical Synthesis of β-Keto Amides
作者:Plamen Angelov
DOI:10.1055/s-0029-1219836
日期:2010.5
A practical three-step route for C-acylation/deacetylation of acetoacetamides is described. Initial enamination of the acetoacetamides with Boc-monoprotected ethylenediamine provides β-enamino amides, which are acylated at the α-carbon with excellent selectivity. The C-acylated derivatives undergo domino fragmentation in acidic media to give the corresponding α-Keto amides accompanied by 2-methyl-4
Highly selective synthesis of functionalized polyhydroisoquinoline derivatives via a three-component domino reaction
作者:Xian Feng、Jian-Jun Wang、Zhan Xun、Juan-Juan Zhang、Zhi-Bin Huang、Da-Qing Shi
DOI:10.1039/c4cc08900f
日期:——
have been synthesized via the three-component domino reaction of glutaraldehyde and malononitrile with a series of beta-ketoamides under microwave irradiation conditions in the presence of a catalytic amount of Et3N (10 mol%). This reaction represents the first reported process for the facile conversion of a beta-ketoamide to a hydroisoquinoline via a C-N bond cleavage reaction without the need for
As a continuation of our research and with the aim of obtaining new anti-tuberculosis agents which can improve the current chemotherapeutic anti-tuberculosis treatments, forty-three new quinoxaline-2-carboxamide 1,4-di-N-oxide derivatives were synthesized and evaluated for in vitro anti-tuberculosis activity against Mycobacterium tuberculosis strain H(37)Rv. Active compounds were also screened to assess toxicity to a VERO cell line. Results indicate that compounds with a methyl moiety substituted in position 3 and unsubstituted benzyl substituted on the carboxamide group provide an efficient approach for further development of anti-tuberculosis agents. (C) 2010 Elsevier Masson SAS. All rights reserved.