手性化合物合成。
手性化合物合成
合成路线 1(1. 合成:100306-34-1)
产率:94%
合成条件:With potassium formate In water; toluene at 50℃; for 24 h;
实验步骤:将3.36g(40.0mmol)HCOOK作为氢源,2.609mg(4.0μmol)Cp * IrCl [(S,S)-MsDPEN]作为催化剂,并引入1.349g(8.0mmol)β-氯苯丙酮。 用20mL Schlenk管,混合物进行氩气置换。 加入2mL水和2ml甲苯,并将所得混合物在搅拌下在50℃下保持24小时。 将有机相用3mL水洗涤三次,并在减压下蒸馏出甲苯,得到光学活性的醇。 反应物的GC分析证实,产生了光学纯度为85%ee的3-氯-1-苯基丙烷-1-醇,产率为94%。
参考文献:
- [1] Patent: US2009/62573, 2009, A1. Location in patent: Page/Page column 7; 14 [2] Organic and Biomolecular Chemistry, 2014, vol. 12, # 6, p. 1009 - 1017 [3] Patent: KR2015/116956, 2015, A. Location in patent: Paragraph 0176-0179 [4] Patent: KR2016/44117, 2016, A. Location in patent: Paragraph 0063-0066 [5] Organic and Biomolecular Chemistry, 2011, vol. 9, # 10, p. 3854 - 3862 [6] Chirality, 2012, vol. 24, # 10, p. 847 - 853,7 [7] Tetrahedron Letters, 2012, vol. 53, # 28, p. 3680 - 3682 [8] Bioorganic and Medicinal Chemistry Letters, 2008, vol. 18, # 18, p. 4929 - 4931 [9] Synthesis (Germany), 2016, vol. 48, # 19, p. 3241 - 3253 [10] Tetrahedron Asymmetry, 2006, vol. 17, # 12, p. 1769 - 1774 [11] Journal of Organic Chemistry, 1988, vol. 53, # 13, p. 2916 - 2920 [12] Journal of the Chemical Society, Perkin Transactions 1, 2000, # 11, p. 1767 - 1769 [13] Journal of the Chemical Society, Perkin Transactions 1, 2000, # 11, p. 1767 - 1769 [14] Tetrahedron Asymmetry, 1992, vol. 3, # 4, p. 525 - 528 [15] Chemistry - A European Journal, 2011, vol. 17, # 50, p. 14234 - 14240 [16] Journal of Molecular Catalysis B: Enzymatic, 2011, vol. 70, # 3-4, p. 114 - 118 [17] Chirality, 2012, vol. 24, # 10, p. 847 - 853,7 [18] Tetrahedron Asymmetry, 2014, vol. 25, # 18-19, p. 1264 - 1269
合成路线 2(2. 合成:100306-34-1)
产率:75%
合成条件:With dimethylsulfide borane complex; C 23 H 22 BNO 3 In tetrahydrofuran at 20℃; for 2 h;
实验步骤:将制备例2.5中制备的Cat-5(0.05mmol,20mg)溶解在1ml THF中,加入BH3-DMS(0.42mmol,0.04ml),搅拌混合物约7分钟。 向反应混合物中滴加3-氯苯丙酮(0.6mmol,100mg)的0.45ml THF溶液。 在室温下反应2小时后,通过加入甲醇终止反应。 以与实施例1.1相同的方式获得(R)-3-氯-1-苯基丙醇(产率:75%,73%ee)。
参考文献:
- [1] Patent: KR2015/116956, 2015, A. Location in patent: Paragraph 0143; 0154; 0155 [2] Tetrahedron Letters, 2005, vol. 46, # 3, p. 495 - 498 [3] Tetrahedron Letters, 1993, vol. 34, # 26, p. 4145 - 4148 [4] Journal of the Chemical Society, Chemical Communications, 1986, # 13, p. 1018 - 1019 [5] Tetrahedron, 2002, vol. 58, # 6, p. 1069 - 1074 [6] Tetrahedron Asymmetry, 2001, vol. 12, # 16, p. 2323 - 2329 [7] Organic Letters, 2006, vol. 8, # 14, p. 2969 - 2972 [8] Tetrahedron Letters, 2007, vol. 48, # 33, p. 5799 - 5802 [9] Patent: US2009/62573, 2009, A1. Location in patent: Page/Page column 8; 14 [10] Organic Letters, 2009, vol. 11, # 2, p. 305 - 308 [11] Organic Process Research and Development, 2012, vol. 16, # 4, p. 710 - 713 [12] Green Chemistry, 2014, vol. 16, # 5, p. 2680 - 2688 [13] Catalysis Letters, 2014, vol. 144, # 7, p. 1289 - 1295 [14] Chemistry - A European Journal, 2014, vol. 20, # 38, p. 12190 - 12200 [15] Tetrahedron Asymmetry, 2015, vol. 26, # 24, p. 1453 - 1458 [16] Organic and Biomolecular Chemistry, 2016, vol. 14, # 18, p. 4304 - 4311 [17] Journal of Molecular Catalysis A: Chemical, 2016, vol. 421, p. 138 - 145 [18] Advanced Synthesis and Catalysis, 2017, vol. 359, # 3, p. 426 - 431
合成路线 3(3. 合成:100306-34-1)
产率:88 % ee
合成条件:With Burkholderia species lipoprotein lipase; C 51 H 77 NO 17 ; dextrin In toluene at 25℃; for 6 h; Enzymatic reaction
实验步骤:通用方法:在典型的方法中,将乙酸异丙烯酯(1.5当量)加入到含有BSLPL-1c-D(3mg),底物(0.3mmol)和无水甲苯(0.5M)的4mL小瓶中。 然后将所得溶液在25℃下摇动直至反应达到46-50%的转化率。 用二氯甲烷稀释后,将反应混合物通过硅藻土垫过滤,浓缩,然后通过HPLC分析以确定剩余底物和乙酰化产物的对映体过量。 然后使用下式计算对映选择性(E):E = 1n [1-c(1 + eep)] / ln [1-c(1-eep)]其中c = ees /(ees + eep)。 4a的动力学拆分:(S)-4a(82%ee)和(R)-5a(97%ee); 转换率为46%; E => 100。 动力学分辨率为4b:(S)-4b(> 99%ee)和(R)-5b(97%ee); 50%转换;E =>100。
参考文献:
- [1] Journal of Organic Chemistry, 2004, vol. 69, # 6, p. 1972 - 1977 [2] Journal of Molecular Catalysis B: Enzymatic, 2016, vol. 134, p. 148 - 153