Synthetic Route of 6298-96-0, A common heterocyclic compound, 6298-96-0, name is 1-(4-Methoxyphenyl)ethylamine, molecular formula is C9H13NO, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
To a 250 mL RBF was added (S)-1-(4-methoxyphenyl)ethanamine (6.24 ml, 42.3 mmol), 1-(5- methylpyridin-2-yl)ethanone (6.0 g, 44.4 mmol), DCM (Volume: 106 ml) and STAB-H (17.92 g, 85 mmol) at rt and the reaction was stirred for 24h. The reaction was quenched by the addition of 1N NaOH until a pH of 8 was achieved. The phases were separated and the organic layer was treated with 1N NaOH until pH 11 was observed. The DCM layer was dried with MgSO4, filtered and concentrated to an oily residue. The residue was purified via combiflash to separate the diastereomers (~4:1 by crude NMR, 80g column 10-30% EtOAc in hexanes, over 40 min). The fractions were concentrated to a clear oil which was crystallized using hexanes (S)-1-(4-methoxyphenyl)-N-((S)-1-(5-methylpyridin-2-yl)ethyl)ethanamine (5.1 g, 18.86 mmol, 45 % yield). 1H NMR (400 MHz, CDCl3): delta= 8.40 (d, J= 2.1 Hz, 1H), 7.39 (ddd, J= 7.8, 2.4, 0.8 Hz, 1H), 7.15 (d, J= 8.5 Hz, 2H), 6.93 (d, J= 8.1 Hz, 1H), 6.83 (d, J= 8.5 Hz, 2H), 3.78 (s, 3H), 3.53 (q, J= 6.8 Hz, 1H), 3.37 (q, J= 6.6 Hz, 1H), 1.26 (d, J= 6.4 Hz, 3H), 1.24 (d, J= 6.5 Hz, 3H); LC/MS 75% MeOH in H2O over 3 minutes, rt = 0.480 at 254 nM, MS (+) 271.2.
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; EMORY UNIVERSITY; LIOTTA, Dennis C.; JECS, Edgars; WILSON, Robert James; NGUYEN, Huy Hoang; KIM, Michelle Bora; WILSON, Lawrence; MILLER, Eric James; TAHIROVIC, Yesim Altas; TRUAX, Valarie; KAISER, Thomas; (311 pag.)WO2018/156595; (2018); A1;,
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