Preparation of 1,2- and 1,4-dihydro derivatives of 6,7-dimethyl-2,3-diphenylquinoxaline via its dianion formed by reductive metallation
作者:Seniz Kaban、Feray Aydogan
DOI:10.1007/s00706-007-0812-1
日期:2008.6
with sodium in tetrahydrofuran formed a monomeric dianion. The chemical behavior of this dianion was investigated by a variety of reagents. As the result, alkylation reactions gave 1,2-dihydro derivatives, while acylation reactions occured at 1,4-positions. Annulation of the pyrazine ring system was accomplished by treating the dianion with oligomethylene dichlorides, Cl(CH2) n Cl, n = 2–4.
在四氢呋喃中用钠处理6,7-二甲基-2,3-二苯基喹喔啉形成单体二价阴离子。通过多种试剂研究了该二价阴离子的化学行为。结果,烷基化反应得到1,2-二氢衍生物,而酰化反应发生在1,4-位。吡嗪环系统的环化是通过用低聚亚甲基二氯化物Cl(CH 2) n Cl, n = 2-4处理二价阴离子来完成的。