反应详情

(R)-tert-butyl 3-((diethylamino)methyl)morpholine-4-carboxylate (INTERMEDIATE 90, STEP 1) was dissolved with TFA/DCM, (6 ml, 1:1 v/v) and the resulting mixture was stirred for 1 h at room temperature. The volatiles were removed under reduced pressure and the concentrate was treated with 4N HCl in dioxane (3 ml), stirred for 10 minutes and the volatiles were removed under reduced pressure. The resulting semi solid was triturated with diethyl ether (2×30 ml) and dried to give the title product (140 mg, yield: 58%).

1. customThe volatiles were removed under reduced pressure
2. additionthe concentrate was treated with 4N HCl in dioxane (3 ml)
3. stirringstirred for 10 minutes
4. customthe volatiles were removed under reduced pressure
5. customThe resulting semi solid was triturated with diethyl ether (2×30 ml)
6. customdried