Unexpected behavior of 6H,13H-5:12,7:14-dimethanedibenzo[d,i][1,3,6,8]tetraazecine (DMDBTA) toward phenols
作者:Augusto Rivera、Mauricio Maldonado
DOI:10.1016/j.tetlet.2006.08.045
日期:2006.10
electron-deficient phenols. Otherwise, electron-rich phenols such as 4-chloro-3,5-dimethylphenol or 2-naphthol produce an ortho-regioselective aminomethylation resulting in 2-(1H-benzimidazol-1-ylmethyl)-4-chloro-3,5-dimethylphenol (7) and 1-(1H-benzimidazol-1-ylmethyl)-2-naphthol (8) in a Mannich type reaction in a basic medium. Moreover, obtainment of 1,1′-methylenbis(1H-benzimidazole) (15) from TTBOE
一种新的20元八氮杂大环化合物,名为1:4,6:9,11:14,16:19-四甲基四苯并[ b,g,l,q ] [1,4,6,9,11,14,16,19 []八氮唑烟碱(TTBOE)(9)是通过氨基6 H,13 H -5:12,7:14-二甲烷二苯并[ d,i ] [1,3,6, 8]四氮嗪(DMDBTA)(3)和缺电子的酚。否则,富含电子的苯酚(例如4-氯-3,5-二甲基苯酚或2-萘酚)会产生邻位区域选择性氨基甲基化,从而导致2-(1 H-苯并咪唑-1-基甲基)-4-氯-3,5-二甲基苯酚(7)和1-(1 H-苯并咪唑-1-基甲基)-2-萘酚(8)在碱性介质中的曼尼希型反应中。此外,讨论了从TTBOE获得1,1'-亚甲基双(1 H-苯并咪唑)(15)。