Tetraphenylborate Salt of Bambuterol (Bambec®): Synthesis, Characterization and X-ray Structure of N-(2-(3,5-bis((dimethylcarbamoyl)oxy)phenyl)-2-hydroxyethyl)-2-methylpropan-2-aminium tetraphenylborate
作者:Gamal A. E. Mostafa、Hazem A. Ghabbour、Obaid S. AlRuqi、Hoong-Kun Fun、Hatem A. Abdel-Aziz
DOI:10.1007/s10870-015-0592-0
日期:2015.5
The title compound tetraphenylborate salt of bambuterol (Bambec®), N-(2-(3,5-bis((dimethylcarbamoyl)oxy)phenyl)-2-hydroxyethyl)-2-methylpropan-2-aminium tetraphenylborate (4), was prepared in 73 % yield by the reaction of 5-(2-(tert-butylamino)-1-hydroxyethyl)-1,3-phenylene bis(dimethylcarbamate) hydrochloride (bambuterol hydrochloride) (2) with sodium tetraphenylborate (3) in deionized water, at ambient temperature, through anion exchange reaction. The structure of the title borate salt was characterized by IR, mass and 1H NMR analyses. Colorless crystals of 4 suitable for an X-ray structural analysis were obtained by slow evaporation from acetonitrile. Compound 4 crystallizes in the monoclinic, space group P21/c, with a = 8.8931 (2) Å, b = 20.4639 (6) Å, c = 21.4393 (6) Å, β = 93.640 (2)°, V = 3893.81 (18) Å3, Z = 4. Synthesis, characterization and X-ray structure of tetraphenylborate salt of bambuterol (Bambec®), the drug for the treatment of asthma, bronchospasm, emphysema, and chronic obstructive pulmonary disease.
标题化合物——班布特罗(Bambec®)的四苯基硼酸盐,N-(2-(3,5-双((二甲基氨基甲酰基)氧)苯基)-2-羟乙基)-2-甲基丙-2-铵四苯基硼酸盐(4),通过5-(2-(叔丁基氨基)-1-羟乙基)-1,3-亚苯基双(二甲基氨基甲酸酯)盐酸盐(班布特罗盐酸盐)(2)与四苯基硼酸钠(3)在去离子水中、室温下的阴离子交换反应制备,产率为73%。标题硼酸盐的结构通过IR、质谱和1H NMR分析进行了表征。通过乙腈中的缓慢蒸发获得了适合X射线结构分析的无色晶体4。化合物4结晶为单斜晶系,空间群P21/c,晶胞参数为a = 8.8931 (2) Å,b = 20.4639 (6) Å,c = 21.4393 (6) Å,β = 93.640 (2)°,V = 3893.81 (18) Å3,Z = 4。合成、表征及X射线结构分析了治疗哮喘、支气管痉挛、肺气肿和慢性阻塞性肺病的药物班布特罗(Bambec®)的四苯基硼酸盐。