3-Methoxybenzylamine → tert-Butyl (1S,2R)-1-benzyl-2-hydroxy-3-[(3-methoxybenzyl)amino]propylcarbamate

Beteiligte Stoffe

Reaktionsschritte

tert-Butyl 1-(2-oxiranyl)-2-phenylethylcarbamate (V, commercially available, 20 g, 76 mmole) is dissolved in i-propanol (380 ml). To this mixture is added 3-methoxybenzyl amine (49 ml, 380 mmole). The reaction mixture is heated to reflux for 1 hr (when HPLC indicated complete reaction). The reaction mixture is concentrated under reduced pressure and the residue is treated with hexane (500 ml). The product is isolated by filtration. The mother liquors are concentrated under reduced pressure to give additional crude material which is partitioned between ethyl acetate (50 ml) and water (50 ml). The mixture is acidified with concentrated hydrochloric acid (to pH=4), the organic phase is separated and washed with water, saline, dried over sodium sulfate and then concentrated under reduced pressure to give additional title compound, M+H=401.

Herkunft & Nachweise