This work describes the compounds 5-bromo-1-methyl-2-[N-methyl-N-(2′-O-tert-butylcarbonatethyl)-4′-aminophenyl]-1H-benzo[d]imidazole (4) and 6-bromo-1-methyl-2-[N-methyl-N-(2′-O-tert-butylcarbonatethyl)-4′-aminophenyl]-1H-benzo[d]imidazole (5), C22H26BrN3O3, which correspond to two regioisomers that were obtained by N-methylation of the corresponding 6-bromobenzimidazole derivative. The structures of these two regioisomers have been confirmed in solution by NMR NOESY experiments, as well as in the solid state using single crystal X-ray diffraction analysis. The structures of 4 and 5 comprise two planar benzimidazole and benzene fragments and a disordered aliphatic chain containing a terminal carbamate group. Compound 4 crystallized in the monoclinic P21/c group with unit cell parameters a = 23.0178(7) Å, b = 7.9106(2) Å, c = 11.9758(3) Å, β = 93.340(2)º, V = 2176.90(10) Å3, Z = 4, D = 1.405 Mg/m3. Compound 5 crystallized in the triclinic P-1 group with unit cell parameters a = 6.7187(3) Å, b = 16.5203(10) Å, c = 21.3544(13) Å, α = 109.279(2)º, β = 94.802(2)º, γ = 98.871(2)º, V = 2187.4(2) Å3, Z = 4, D = 1.398 Mg/m3. Two regiosomers of benzimidazole derivatives are reported, including the elucidation of their structures in solution by NMR NOESY experiments and in the solid state by X-ray diffraction studies.
                                    本研究介绍了 5-
溴-1-甲基-2-[N-甲基-N-(2′-O-叔丁基羰基乙基)-4′-
氨基苯基]-1H-苯并[d]
咪唑(4)和 6-
溴-1-甲基-2-[N-甲基-N-(2′-O-叔丁基羰基乙基)-4′-
氨基苯基]-1H-苯并[d]
咪唑(5)、
C22H26BrN3O3,它们对应于通过对相应的 6-
溴苯并咪唑衍
生物进行 N-甲基化而得到的两种区域异构体。这两种区域异构体的结构已通过核磁共振 NOESY 实验在溶液中得到证实,并通过单晶 X 射线衍射分析在固态中得到证实。4 号和 5 号化合物的结构由两个平面
苯并咪唑和苯片段以及一个含有
氨基甲酸酯末端基团的无序脂肪族链组成。化合物 4 在单斜 P21/c 组中结晶,单胞参数 a = 23.0178(7) Å, b = 7.9106(2) Å, c = 11.9758(3) Å, β = 93.340(2)º, V = 2176.90(10) Å3, Z = 4, D = 1.405 Mg/m3.化合物 5 以三菱 P-1 族结晶,单胞参数 a = 6.7187(3) Å, b = 16.5203(10) Å, c = 21.3544(13) Å, α = 109.279(2)º, β = 94.802(2)º, γ = 98.871(2)º, V = 2187.4(2) Å3, Z = 4, D = 1.398 Mg/m3.报告了
苯并咪唑衍
生物的两种外消旋体,包括通过核磁共振 NOESY 实验阐明了它们在溶液中的结构,以及通过 X 射线衍射研究阐明了它们在固态中的结构。