[1]Benzothienopyrimidines. II. Study of the electrophilic substitutions of [1]benzothieno[3,2-<i>d</i>]pyrimidine and [1]benzothieno[3,2-<i>d</i>]pyrimidin-4-(3<i>H</i>)one
作者:Sylvain Rault、Michel Cugnon De Sévricourt、Paulette Touzot、Max Robba、Hussein El-Kashef
DOI:10.1002/jhet.5570170710
日期:1980.11
The nitration and bromination of both [1]benzothieno[3,2-d]pyrimidin-4(3H)one (1) and [1]benzothieno-[3,2-d]pyrimidine (2) has been studied. Nitration of 1 at −30° afforded a mixture of 8-nitro[1]benzothieno-[3,2-d]pyrimidin-4(3H)one (7b) (70%) and 6-nitro[1]benzothieno[3,2-d]pyrimidin-4(3H)one (7a) (30%). However when the nitration was carried out at 60°, the 6,8-dinitro derivative 8 was the result
研究了[1]苯并噻吩并[3,2 - d ]嘧啶-4(3 H)酮(1)和[1]苯并噻吩并-[3,2- d ]嘧啶(2)的硝化和溴化作用。在-30°下硝化1,得到8-硝基[1]苯并噻吩并- [3,2 - d ]嘧啶-4(3H)酮(7b)(70%)和6-硝基[1]苯并噻吩并[ 3,2 - d ]嘧啶-4(3H)1(7a)(30%)。然而,当在60°下进行硝化时,得到了6,8-二硝基衍生物8。相反,2的硝化作用在-30℃下,得到单一硝化产物8-硝基[1]苯并噻吩并[3,2- d ]嘧啶(11)。1和2的溴化均得到相应的8-溴衍生物10和13。所有产物的结构分配均基于红外光谱和核磁共振光谱研究以及明确的合成。