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. 87-63-8, name is 2-Chloro-6-methylaniline, A new synthetic method of this compound is introduced below., name: 2-Chloro-6-methylaniline
To a cold stirring solution of 2-chloro-6-methylaniline (59.5 g 0.42 mol) and pyridine (68 ml, 0.63 mol) in THF (600 mL) was added 3-ethoxyacryloyl chloride (84.7 g, 0.63 mol) slowly keeping the temp at 0-5C. The mixture was then warmed and stirred for 2 h. at 20C. Hydrochloric acid (1N, 115 mL) was added at 0-10C. The mixture was diluted with water (310 mL) and the resulting solution was concentrated under vacuum to a thick slurry. The slurry was diluted with toluene (275 mL) and stirred for 15 min. at 20-22C then 1 h. at 0C. The solid was collected by vacuum filtration, washed with water (2 x 75 mL) and dried to give 74.1 g (73.6 % yield) of (E)-N-(2-chloro-6-methylphenyl)-3-ethoxyacrylamide). lH NMR (400 Hz, DMSO-d6) 8 1. 26 (t, 3H, J= 7 Hz), 2.15 (s, 3H), 3.94 (q, 2H, J= 7 Hz), 5.58 (d, 1H, J=12.4 Hz), 7.10-7. 27 (m, 2H, J=7.5 Hz), 7.27-7. 37 (d, 1H, J=7.5 Hz), 7.45 (d, 1H, J=12.4 Hz), 9. 28 (s, 1H) ; l3c NMR (100MHz, CDC13) b : 14. 57, 18.96, 67.17, 97.99, 126. 80, 127. 44, 129. 07, 131.32, 132.89, 138. 25,161. 09,165. 36.
The synthetic route of 87-63-8 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; WO2005/77945; (2005); A2;,
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