Synthesis of substituted 4-(3-alkyl-1,2,4-oxadiazol-5-ylmethyl)-3,4-dihydro-2H-1,4-benzoxazines and 4-(1H-benzimidazol-2-ylmethyl)-3,4-dihydro-2H-1,4-benzoxazines
作者:Pushpak Mizar、Bekington Myrboh
DOI:10.1016/j.tetlet.2006.08.029
日期:2006.10
Substituted 2H-1,4-benzoxazines were synthesized from substituted 2-amino phenols and 1,2-dibromoethane using K2CO3 in good to excellent yields. The cyclized products were further reacted with alkyl bromides to obtain the desired N-substituted 3,4-dihydro-2H-1,4-benzoxazines.
使用K 2 CO 3由取代的2-氨基苯酚和1,2-二溴乙烷合成了2 H -1,4-苯并恶嗪,收率良好。使环化产物进一步与烷基溴反应,得到所需的N-取代的3,4-二氢-2 H -1,4-苯并恶嗪。
Synthesis and Biological Evaluation of New 2-(4,5-Dihydro-1<i>H</i>-imidazol-2-yl)-3,4-dihydro-2<i>H</i>-1,4-benzoxazine Derivatives
derivatives and tricyclic analogues with a fused additional ring on the nitrogenatom of the benzoxazine moiety have been prepared and evaluated for their cardiovascular effects as potential antihypertensive agents. The imidazoline ring was generated by reaction of the corresponding ethyl ester with ethylenediamine. Affinities for imidazoline binding sites (IBS) I(1) and I(2) and alpha(1) and alpha(2)