Synthesis and Crystal Structures of 4-(3-Nitropyridin-2-ylamino)phenol and 4-(3-Aminopyridin-2-ylamino)phenol
作者:Sheng-Li Cao、Jie Zhao、Nan Zhang、Yue Wang、Yu-Yang Jiang、Yu-Ping Feng
DOI:10.1007/s10870-011-0121-8
日期:2011.10
monoclinic system, with a = 10.688(2) Å, b = 14.2181(18) Å, c = 7.9836(15) Å and α = 90.00°, β = 125.801(7)°, γ = 90.00°. In both crystal structures, the intermolecular N–H–O and O–H–N hydrogen bonds link the molecules, which effectively stabilize the structures.Graphical AbstractThe preparation and crystal structures of 4-(3-nitropyridin-2-ylamino)phenol and 4-(3-aminopyridin-2-ylamino)phenol are reported
标题化合物 4-(3-nitropyridin-2-ylamino)phenol (I) 和 4-(3-aminopyridin-2-ylamino)phenol (II) 是用于合成潜在抗肿瘤剂 ABT-751 的两种中间体. 4-氨基苯酚与2-氯-3-硝基吡啶反应生成I,通过还原将其转化为II。代替许多文献中描述的 Pd/C 催化加氢,在水性介质中使用廉价的硫化钠进行还原以缩短反应时间并简化操作。通过单晶X射线衍射确定所得化合物的晶体结构。化合物I在单斜晶系的P21/c空间群中结晶,a = 11.5236(19) Å, b = 8.7389(17) Å, c = 10.684(3) Å, α = 90.00°, β = 107.76(3) )°, γ = 90.00°。化合物II在单斜晶系的Cc空间群中结晶,a = 10.688(2) Å,b = 14.2181(18) Å,c = 7