Water → HCID 117603750, compound

Temperature

0 °C

To a solution of 1-tert-butyl 4-methyl 4-(but-3-en-1-yl)piperidine-1,4-dicarboxylate (21.2 g, 71.3 mmol) in THF (300 mL) at 0° C. was added 2M LAH/THF (35.6 mL, 71.3 mmol) and the resulting mixture was stirred at 0° C. for 1 h and then stirred at room temp for 2 h. The mixture was then recooled to 0° C. and water (2.7 mL), IN NaOH (2.7 mL) and water (8.2 mL) were added successively and the mixture was stirred for 5 min. The solids were filtered off and the cake was washed with ethyl acetate. The filterate was washed with water (2×50 mL), brine (100 mL), dried (Na2SO4), filtered and concentrated under reduced pressure to give tert-butyl 4-(but-3-en-1-yl)-4-(hydroxymethyl)piperidine-1-carboxylate (16.5 g, 61.3 mmol, 86% yield) as yellow oil. 1H NMR (500 MHz, CDCl3) δ 5.90-5.78 (m, 1H), 5.13-5.01 (m, 1H), 5.01-4.86 (m, 1H), 3.57-3.42 (m, 4H), 3.39-3.28 (m, 2H), 2.46-2.33 (m, 1H), 2.06-1.99 (m, 2H), 1.54-1.38 (m, 14H).

1. stirringstirred at room temp for 2 h
2. customwas then recooled to 0° C.
3. stirringthe mixture was stirred for 5 min
4. filtrationThe solids were filtered off
5. washthe cake was washed with ethyl acetate
6. washThe filterate was washed with water (2×50 mL), brine (100 mL)
7. dry with materialdried (Na2SO4)
8. filtrationfiltered
9. concentrationconcentrated under reduced pressure

ORD record

ord-b8c86a83e8d94e9d81b70b187b6e5320

Source dataset

uspto-grants-2016_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09409922B2