Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 14447-18-8, name is Benzyl cyanoacetate, A new synthetic method of this compound is introduced below., category: nitriles-buliding-blocks
Synthesis of 2-(2-(methylsulfonyl)-4-trifluoromethylbenzoyl)acetonitrile 1.10 g of magnesium chloride (11.5 mmol) in 15 ml of acetonitrile are admixed at 0 C. with 2.0 g (11.4 mmol) of benzyl cyanoacetate and 2.3 g (22.9 mmol) of triethylamine. After stirring for 20 min at 0 C., 3.27 g (11.4 mmol) of 2-(methylsulfonyl)-4-trifluoromethylbenzoyl chloride are added in portions. The mixture is stirred for 16 h at RT, acidified with 2n HCl and extracted with ether. The organic phase is dried and concentrated in a rotary evaporator. Yield 2.74 g (56%; 1H-NMR, CDCl3, 400 MHz: 14.20 (bs, 1H), 8.43 (s, 1H), 8.05 (d, 1H), 7.82 (d, 1H), 5.40 (s, 2H), 3.30 (s, 3H)) of benzyl 2-(2-(methylsulfonyl)-4-trifluoromethylbenzoyl)cyanoacetate, which, after adding 0.65 g (1 eq) of triethylamine in THF, is hydrogenated for 2 h. After filtration, the mixture is diluted with ethyl acetate and washed with 2N HCl, NaHCO3 solution and sodium chloride solution. Yield 1.41 g (75%). 1H NMR, CDCl3, 400 MHz: 8.36 (s, 1H), 8.04 (d, 1H), 7.63 (d, 1H), 4.03 (s, 2H), 3.21 (s, 3H).
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Patent; Braun, Ralf; Willms, Lothar; Heinemann, Ines; Haeuser-Hahn, Isolde; Dietrich, Hansjoerg; Gatzweiler, Elmar; Rosinger, Christopher Hugh; US2014/342906; (2014); A1;,
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