普卡必利的NMR研究

摘要

以4-氨基-5-氯-2,3-二氢苯并呋喃-7-羧酸和1-(3-甲氧基丙基)-4-哌啶胺为原料,通过酰胺缩合反应合成了普卡必利.普卡必利化学名为4-氨基-5-氯-2,3-二氢-N-[1-(3-甲氧基丙基)-4-哌啶基]-7-苯并呋喃甲酰胺,是二氢苯并呋喃的衍生物5-H4受体拮抗剂,是一种治疗慢性便秘的重要药物.普卡必利结构中存在多个化学环境非常接近的碳原子,核磁共振(NMR)谱图相对复杂.本文首先应用超高效液相色谱-串联质谱(UPLC-MS/MS)和液相色谱-高分辨质谱(LC-HRMS)对其元素组成进行了分析,进而用一维和二维NMR谱(包括1H NMR、13C NMR、DEPT、1H-1HCOSY、1H-13C HSQC、1H-13C HMBC)对普卡必利的1H和13C NMR信号进行了指认归属,确定了其结构.本工作对苯并呋喃衍生物及相关下游药物合成工艺的进一步优化,以及相关衍生药物的研究具有参考价值.%4-Amino-5-chloro-2,3-dihydro-N-[1-(3-methoxypropyl)-4-piperidinyl]-7-benzofurancarboxamide was synthesized by amide condensation reaction using 4-amino-5-chloro-2,3-dihydrobenzofuran-7-carboxylic acid and 1-(3-methoxypropyl)-4-piperidinamine as the reactants.The resultant compound,also named prucalopride,is a derivative of dihydrobenzofuran 5-H4 receptor antagonist,and an important drug for treating chronic constipation.The NMR spectrum of prucalopride is crowded and complex due to the fact that there are many carbon atoms in the molecule have similar chemical environment.In this study,ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) and liquid chromatography-high resolution mass spectrometry (LC-HRMS) were used to analyze the composition of prucalopride.1H NMR,13C NMR,DEPT,1H-1H COSY,1H-13C HSQC and 1H-13C HMBC spectra of the compound were collected,and its 1H and 13C NMR signals were assigned.