Page 228 - 《精细化工》2022年第2期
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·432·                             精细化工   FINE CHEMICALS                                 第 39 卷

            1.04%,最大单杂纯度为 0.41%。                                  (3)本工作不足之处可能未考虑到反应溶剂量
            2.4   公斤级制备实验                                      对产物收率影响,需进一步优化;该工艺放大至公
                 为进一步确认工艺的合理性和有效性,将优化                          斤级时产量虽比小试略低,但产物纯度高,同时减
            后的小试工艺放大 10 倍。操作简要如下:                              少了精制步骤,降低了生产成本,总体来说,本工
                 在玻璃反应釜 1 中加入 0.9 kg  Ⅲ、8.0 kg DCM、            艺具有更好的工业应用前景和市场价值。
            1.0 kg BSA 制备反应液 A;在玻璃反应釜 2 中加入
                                                               参考文献:
            1.0 kg  Ⅱ、10.4 kg DCM、3 kg TEA、0.8 kg TMSCl
            制备Ⅱ-1 反应液,降温至–30  ℃,滴入 0.6 kg TiCl 4 ,             [1]   ZHANG Y C  (张云才), ZHANG F  (张钒). Improved synthesis of
                                                                   ezetimibe[J]. Chinese Journal of Pharmaceuticals (中国医药工业杂
            再将反应液 A 滴入玻璃反应釜 2 中,保温搅拌 5 h;                          志), 2018, 49(2): 163-166.
            经一系列处理,加入 1.9 kg BSA,回流搅拌 2 h,最                    [2]   ZHANG S R (张淑蓉), LI L L (李雷雷), WEN J (文军),  et al.
                                                                   Enzymatic synthesis of ezetimibe[J].  Journal of Southwest China
            后在乙酸异丙酯和正己烷中析晶,过滤,真空 45  ℃
                                                                   Normal University (Natural Science Edition) (西南师范大学学报:
            干燥得 0.98 kg 浅黄色固体Ⅰ(收率为 49%,HPLC                        自然科学版), 2015, 40(10): 173-176.
            检测产物纯度为 95.16%,总杂纯度 4.84%,最大单                      [3]  HUANG W  (黄伟), CEN J D (岑均达). Synthesis of ezetimibe[J].
                                                                   Chinese Journal of Pharmaceuticals (中国医药工业杂志), 2006,
            杂纯度为 2.87%)。                                           37(6): 364-366.
                 从结果来看,产物纯度与前期小试基本一致,                          [4]   YU Z P (于振鹏), LIU S (刘石), TAN X D (谭相端), et al. Synthesis
                                                                   of ezetimibe[J]. Chinese Journal of Pharmaceuticals (中国医药工业
            但收率相比偏低,主要是在滴入 TiCl 4 后,反应环境
                                                                   杂志), 2013, 44(5): 424-428.
            酸性太强,发现Ⅱ-1 中酰胺键存在断裂,且在长时                           [5]   GAO Z Q (高中强), ZHANG H F (张海峰), QIN L (秦龙),  et al.
            间滴加反应液 A 的过程中,Ⅲ-1 的—C==N—在滴                            Progress  in  synthesis  of ezetimibe[J]. Chinese Journal of
                                                                   Pharmaceuticals (中国医药工业杂志), 2020, 51(8): 956-973.
            入至料液后可能存在分解,断键现象更明显,反应                             [6]   JIANG H (江鸿), FU C H (付长华), WEI J (魏娟). Ezetimibe
            选择性降低,收率下降,此工艺存在放大效应,还                                 intermediate and synthesis method of ezetimibe: CN104892537A[P].
                                                                   2015-09-09.
            需进一步优化。
                                                               [7]  WANG  Y  J(王亚江), MENG H(孟红), ZHAO P(赵平),  et al.
                                                                   Preparation method of ezetimibe intermediate: CN103864708A[P].
            3   结论                                                 2014-06-18.
                                                               [8]   WANG B Q (王宝琴), LI L Z (李立忠), SU Z Q (苏志强), et al.
                (1)对Ⅲ采用 BSA 保护酚羟基,反应条件温                            Catalytic  synthesis  method  of  ezetimibe  intermediate:
                                                                   CN105566375A[P]. 2016-05-11.
            和,易于脱除保护,且 BSA 在后续反应中无影响,                          [9]   THIRUVENGADAM T K, FU X,  TANN C,  et al. Process for the
            避免了采用苄基保护酚羟基导致的催化氢化条件                                  synthesis of azetidinones: WO0034240(A1)[P]. 2000-06-15.
                                                               [10]  CAI J G (蔡金刚), ZHAO S M (赵世明), LUO Z F (罗振福), et al.
            苛刻问题。
                                                                   Study on the synthesis of ezetimibe intermediate[J]. Fine Chemical
                (2)以Ⅱ和Ⅲ为原料,通过类 Mannich 加成反                         Intermediates (精细化工中间体), 2011, 41(4): 37-39.
            应,确定了Ⅰ的合成路线,同时确定了最佳反应条                             [11]  MRAVLJAK J, SOVA M, KOVAC A, et al. Process for the synthesis
                                                                   of ezetimibe and intermediates useful therefor: US2011183956(A1)[P].
            件:n(Ⅱ)∶n(Ⅲ)∶n(TiCl 4 )=1.0∶1.5∶1.2,反应时                 2011-07-28.
            间 4.0 h,反应温度–30~–25  ℃,此工艺条件下Ⅰ收                    [12]  LEK P D D. Process for the synthesis of ezetimibe and intermediates
                                                                   useful therefor: EP2149547(A1)[P]. 2010-02-03.
            率稳定在 60%上下,未精制产物纯度达 97.28%;一
                                                               [13]  SUN J (孙婕). Study on the synthesis of ezetimibe[D]. Nanjing:
            次精制后产物纯度达 98.96%。                                      Nanjing Normal University (南京师范大学), 2015.



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