cascade of benzo 1,2-diols, 1,2-thiols and 2-(benzylamino)phenols with stable and easily available vinyl selenones affords differently substituted 2,3-dihydro-1,4-benzodioxines, benzodithiines and 3,4-dihydro-2H-1,4-benzoxazines in good yields. The same procedure has been extended to the synthesis of 1,2,3,4-tetrahydroquinoxalines. All of these heterocycles are present in a variety of biologically active
                                    描述了一种新颖且通用的六元双环苯并稠合的1,4-杂环的方法。苯并1,2
-二醇,1,2-
硫醇和2-(苄
氨基)
苯酚与稳定且易于获得的
乙烯基硒酮的加成环合级联反应提供了不同取代的2,3-二氢-1,4-苯并二恶英,苯并二
噻吩和3 ,4-二氢-2 H -1,4-苯并恶嗪的收率很高。相同的程序已扩展到
1,2,3,4-四氢喹喔啉的合成。所有这些杂环都存在于多种
生物活性化合物中。