English  |  正體中文  |  简体中文  |  Items with full text/Total items : 51931/87076 (60%)
Visitors : 8493071      Online Users : 134
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/4427

    Title: Diazotization of Methyl 3-Amino-7-isopropyl-2- methoxyazulene-1-carboxylate and Its 5-Isopropyl Isomer---A Convenient Synthesis of 1,2-Azulenequinone Derivatives
    Authors: Huang, Tian-chyuan;Lin, Yun-shan;Lin, Shih-jue;Chu, Shu-fan
    Contributors: 淡江大學化學學系
    Keywords: Diazotization;Azulenequinone;Azulene;Synthesis;重氮化;薁醌;;合成
    Date: 1996-02
    Issue Date: 2013-07-29 13:48:37 (UTC+8)
    Publisher: 臺北市:中國化學學會
    Abstract: Methyl 3-amino-2-methoxy-7-isopropylazulene-1- carboxylate (8a) and its 5-isopropyl isomer (8b) were synthesized by reduction of the 3-nitro derivatives (7a,b) with zinc/acetic acid in excellent yields. 7a and 7b were prepared by nitration and methylation of methyl 7-isopropyl- 2-hydroxyazulene-1-carboxylate and methyl 5-isopropyl-2- hydroxyazulene-1-carboxylate, respectively. Diazotization of 8a with sodium nitrite in trifluoroacetic acid at 0.degree.C gave methyl 5-isopropyl-1,2- azulenequinone-3- carboxylate 9a in 91% yield. Similar reaction of 8b gave the corresponding methyl 7-isopropyl-1,2-azulenequinone-3- carboxylate 9b in 93% yield. No evidence for the formation of 1-diazo-1,2-azulenequinones was obtained.
    Relation: Journal of the Chinese Chemical Society=中國化學會會誌 43(1), pp.41-44
    DOI: 10.1002/jccs.199600007
    Appears in Collections:[化學學系暨研究所] 期刊論文

    Files in This Item:

    File SizeFormat
    0009-4536_43(1)p41-44.pdf136KbAdobe PDF103View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback