(R)-3-methoxymethylamino-1-phenyl-1-propanol → (1R)-3-(methylamino)-1-phenylpropan-1-ol

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Reaction Steps

The oily product of (R)-3-methoxymethylamino-1-phenyl-1-propanol obtained in example 2 was dissolved in 100 mL of methanol again with 1.2 g of Raney-nickel in a glass autoclave. The resulting solution was hydrogenated at 50° C. for 12 hours. Upon completion of hydrogenation, the reaction mixture was filtered and the solvent was removed under reduced pressure to obtain an objective compound as an oily compound (39.0 g, 96.5% by HPLC assay, 99% ee). The crude product was further purified by re-crystallization in toluene and heptane with optical purity as high as 100% ee. 1H NMR (400 MHz, CDCl3) δ (ppm)=1.7-1.8 (m, 1H), 1.8-1.9 (m, 1H), 2.5 (s, 3H), 2.8-2.9 (m, 2H), 4.9 (dd, J=3, 8.6 Hz, 1H), 7.3-7.4 (m, 5H).

Provenance & Evidence