Synthesis of 2-substituted-3-nitroimidazo[1,2-<i>b</i>]pyridazines as potential biologically active agents
作者:Thierry Terme、Joséa Maldonado、Michel P. Crozet、Patrice Vanelle、Christophe Galtier、Alain Gueiffier
DOI:10.1002/jhet.5570390125
日期:2002.1
first time. It was shown to react under phase-transfer catalysis conditions with 2-nitropropane anion by an SRN1 mechanism to give excellent yield of isopropylidene derivative formed from a base-promoted nitrous acid elimination of C-alkylation product. Extension of this SRN1 reaction to various nitronate anions led to a new class of 3-nitroimidazo[1,2-b]pyridazine derivatives bearing a trisub-stituted
首次合成了一种新型的杂环还原烷基化剂6-氯-2-氯甲基-3-硝基咪唑并[1,2- b ]哒嗪。已表明通过S RN 1机理在相转移催化条件下与2-硝基丙烷阴离子反应,可得到由碱促进的亚硝酸消除C-烷基化产物形成的异亚丙基衍生物的优异收率。该S RN 1反应扩展到各种亚硝酸根阴离子导致了新的一类3-硝基咪唑并[1,2- b ]哒嗪衍生物,该衍生物在2-位带有一个三取代的双键。