Synthesis of benzannelated cycl(3.2.2)azine: Benzo(g)cycl(3.2.2)azine.
作者:Yoshinori Tominaga、Hiromi Gotou、Yukio Oniyama、Yuko Nishimura、Yoshiro Matsuda
DOI:10.1248/cpb.33.3038
日期:——
The benzannalated cycl [3. 2. 2] azine, benzo [g] cycl [3. 2. 2] azine (2), was synthesized from 2-methylthiopyrrolo [2, 1-a] isoquinoline (5) and dimethyl acetylenedicarboxylate. The key intermediate (5) for the synthesis of 2 was prepared using the reaction of isoquinolinium ketene dithioacetal (8) with nitromethane in good yields. Compound 8 was obtained using the reaction of 2-ethoxycarbonylmethylisoquinolinium bromide (6) with carbon disulfide and dimethyl sulfate in the presence of sodium hydroxide followed by methylation with methyl iodide.
苯并环[3.2.2]吖嗪,苯并[g]环[3.2.2]吖嗪(2)由2-甲基硫代吡咯并[2,1-a]异喹啉(5)和乙炔二羧酸二甲酯合成。合成2的关键中间体(5)是通过异喹啉酮二硫代缩醛(8)与硝基甲烷反应制备的,收率较高。化合物8是通过2-乙氧羰基甲基异喹啉溴化物(6)与二硫化碳和硫酸二甲酯在氢氧化钠存在下反应,然后用甲基碘甲基化得到的。