According to the analysis of related databases, 21740-00-1, the application of this compound in the production field has become more and more popular.
Reference of 21740-00-1, In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 21740-00-1 as follows.
2-(2-r(T2i?.5i?V5-([(‘5-Fluoropyridin-2-v?oxylmethvU-2-methylpiperidin-l-yl)carbonyll-4- methylphenvUpyrimidine (E-5)The solution of D-9 (1 kg, 4.46 mol) was charged in a visually clean and dry 50 L flask equipped with a thermocouple and mechanical stirrer and was solvent switched to DCM (11.00 L). DIPEA (2 L, 1 1.45 mol) is added and then EA (1.22 kg, 5.67 mol) was added to this stirring solution. This solution was cooled with an ice bath (12 C). To this stirring solution was added T3P (7.87 L, 13.38 mol) through an addition funnel keeping the reaction temperature <21 0C over Ih. Once addition was completed, the reaction became yellow and heterogenous. To facilitate stirring 2L of DCM were added. The reaction was heated to 44 0C (small exotherm at 42C, which causes the temperature to rise to 46.7 C and maintain that temperature for 30 min). The reaction was aged at this temperature overnight. After 17 h the reaction was not complete and T3P (1.1 L, 1.870 mol) was added to accelerate conversion. The next day (42 h) the reaction was deemed complete by HPLC and was cooled in an ice bath to 4 C. 20 L of water was added (slowly for the first 1.5 L then pretty fast.) keeping the reaction temperature under 17 0C. This mixture was stirred at room temperature for 30 minutes. Then the mixture was transferred into a 50 L extractor charged with 20 L of MTBE. The flask was rinsed with an additional 2 L of water and 4 L of MTBE. The layers were cut and the organics are washed with 20 L IN NaOH and then 10 L of IN NaOH. Finally, the organics were washed twice with 10 L of brine 15%. The organic fractions (quantitative HPLC assay at 1.65 kg) are then treated with ~50w% of Darco KB (75Og) for 1.75 h, filtered on Solka floe and rinsed with 10 mL/g of MTBE (1.559 kg, 94.5% recovery). To a visually clean and dry 50 L RBF equipped with a mechanical stirrer, a thermocouple, a reflux condenser and a nitrogen inlet was charged the crude material from above (E-5 solution and all solvents used were filtered using a 1 mum in-line filter). The reaction mixture was solvent switched to IPAc and the final volume was adjusted to 7.5 L (about 4 mL/g of IPAc). The reaction mixture was warmed to 75 0C (all soluble), cooled to room temperature slowly and seeded at 45 0C with 18 g OfE1S (front run material, obtained from rex in IP Ac/heptane) stirred overnight (16 hr) at room temperature then heptane was added (6 ml/g) over 60 min. The reaction mixture was aged for 1 hr before to be cooled to 5 0C and stirred for 30 min. The suspension was then transferred onto a filter pot and rinsed with IPAC/heptane (2 x 3mL/g of cold 15% IPAc) and heptane (5 mL/g). The residual beige solid was dried under a flow of nitrogen for 18 hr (the product was found to be dry with < 0.3 wt% of solvents). 1.2 kg of E-5 was isolated as a light beige solid (99.4 LCAP, > 99.5 % ee, > 99.5 % dr, Pd level of 8 ppm and KF of 0.1). Data for E^: HRMS m/z (M+H): 421.2067, found. 421.2035, required.
According to the analysis of related databases, 21740-00-1, the application of this compound in the production field has become more and more popular.
Reference:
Patent; MERCK & CO., INC.; WO2008/147518; (2008); A1;,
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