反応 #1857563

反応方程式

3-hydroxy-N-((3S,7S,8S,9S)-8-isopentyl-9-methyl-2-oxo-7-propoxyoxonan-3-yl)-4-methoxypicolinamide

K2CO3

bromomethyl acetate

→

title compound

収率 77.3%

((2-(((3S,7S,8S,9S)-8-isopentyl-9-methyl-2-oxo-7-propoxyoxonan-3-yl)carbamoyl)-4-methoxypyridin-3-yl)oxy)methyl acetate

収率 77.3%

溶媒

acetone

DCM

反応条件

後処理

1. 1
   その他The reaction was sealed
2. 2
   温度cooled to room temperature
3. 3
   workup.ADDITIONtreated with Celite® (3 scoopula tip-fulls)
4. 4
   その他The solvent was removed under reduced pressure
5. 5
   その他purified

実験手順

To a solution of 3-hydroxy-N-((3S,7S,8S,9S)-8-isopentyl-9-methyl-2-oxo-7-propoxyoxonan-3-yl)-4-methoxypicolinamide (125 mg, 0.277 mmol) and K2CO3 (77 mg, 0.555 mmol) in acetone (2.77 mL) was added bromomethyl acetate (54.4 μL, 0.555 mmol). The reaction was sealed, heated to 50° C., stirred at this temperature for 6 h, and then cooled to room temperature. The mixture was diluted with DCM (4 mL) and treated with Celite® (3 scoopula tip-fulls). The solvent was removed under reduced pressure and the resulting adsorbed material was directly loaded onto a column and purified using flash column chromatography (24 g SiO2, 0→100% EtOAc/hexanes) to afford the title compound (112 mg, 0.214 mmol, 77%) as a sticky, slightly yellow oil: IR (thin film): 3378, 2954, 2872, 1740, 1677, 1504, 1202 cm−1; 1H NMR (400 MHz, CDCl3) δ 8.31 (d, J=8.1 Hz, 1H), 8.28 (d, J=5.4 Hz, 1H), 6.95 (d, J=5.4 Hz, 1H), 5.74 (s, 2H), 4.74 (dq, J=10.1, 6.3 Hz, 1H), 4.61 (app dt, J=10.7, 7.6 Hz, 1H), 3.91 (s, 3H), 3.52 (app dt, J=8.9, 6.4 Hz, 1H), 3.31-3.22 (m, 1H), 3.15 (app dt, J=8.9, 6.6 Hz, 1H), 2.45-2.33 (m, 1H), 2.21-2.09 (m, 1H), 2.07 (s, 3H), 1.98-1.86 (m, 1H), 1.85-1.70 (m, 1H), 1.67-1.28 (m, 10H), 1.24-1.03 (m, 2H), 0.97-0.84 (m, 10H); HRMS-ESI m/z [M+Na]1 calcd for: C27H42N2NaO8, 545.2833; found, 545.2853.

出典