Page 228 - 《精细化工》2022年第2期
P. 228
·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.
(上接第 416 页) [19] ZHANG F S (张锋三). Molecular design of aqueous two-phase
[16] Petroleum Industry Standardization Technical Committee Oilfield associated polyacrylamide and construction of continuous mixing
Chemicals Professional Standardization Technical Committee. The process of fracturing fluid[D]. Xi'an: Shaanxi University of Science
method for measurement and evaluating indicator of corrosion inhibitor & Technology (陕西科技大学), 2017.
for acidizing: SY/T5405—2019[S]. Beijing: Petroleum Industry [20] SHEN B B (申贝贝), HU Y Q (胡永全). Mechanism and development
Press (石油工业出版社), 2019. prospect of acid gel agent[J]. Petroleum Chemical Application (石油
[17] FENG X G (冯新根), WANG L (王磊), ZHAO W (赵文), et al. 化工应用), 2012, 31(6): 1-4, 9.
Synergistic effect of different hydrophobic monomers on PAM[J]. [21] SALAMI O T, PLANK J. Synthesis, effectiveness, and working
Modern Chemical Industry (现代化工), 2021, 41(2): 214-218, mechanism of humic acid-sodium 2-acrylamido-2-methylpropane
228. sulfonate-co-N,N-dimethyl acrylamide-co-acrylic acid graft copolymer
[18] GENG T M (耿同谋), WU W H (吴文辉). Study of association as high-temperature fluid loss additive in oil well cementing[J].
behavior of P(AM/NaAA/DiC 8AM) in aqueous solutions utilizing Journal of Applied Polymer Science, 2012, 126(4): 1449-1460.
fluorescence probe[J]. Journal of East China University of Technology [22] FANG Y (方娅), LIU J Y (刘继延). Present situation and development
(Natural Science Edition) (华东理工大学学报: 自然科学版), 2006, trend of acid additive[J]. Drilling Fluid and Completion Fluid (钻井
32(2): 150-154. 液与完井液), 2000, 17(5): 28-33.