Preparation of new nitrogen-bridged heterocycles. 69. Synthesis and Reaction of 1-(α-Hydroxybenzyl)thieno [3,4-b] indolizine Derivatives
作者:Akikazu Kakehi、Hiroyuki Suga、Yukihisa Okumura、Kennosuke Itoh、Shin Hatayama、Daisuke Kubo、Kouji Kobayashi
DOI:10.1515/hc.2010.16.1.53
日期:2010.1
The title compounds, l-(a-hydroxybenzyl)thieno[3,4-o]indolizine derivatives, were obtained in good yields by the reduction of the corresponding l-benzoylthieno[3,4-6]indolizines with sodium borohydride in refluxing ethanol. These compounds were considerably unstable and decomposed gradually even at room temperature, but, on exposure to acetic acid, unexpected condensation took place to afford a,]i
通过在回流乙醇中用硼氢化钠还原相应的 l-苯甲酰基噻吩并 [3,4-6] 吲哚腙,以良好的收率获得标题化合物,即 l-(α-羟基苄基) 噻吩并 [3,4-o] 吲哚嗪衍生物. 这些化合物相当不稳定,即使在室温下也逐渐分解,但是,在暴露于乙酸时,会发生意想不到的缩合反应,在低至中等浓度下得到 a,]indolizin-l-yl) 甲苯