Reacción #1726710

Ecuación de reacción

4-piperidone

2-hydroxy-5-methoxybenzamide

morpholine

→

Compound 150

6-methoxyspiro-[2H-1,3-benzoxazin-2,4′-piperidin]-4-(3H)-one

Disolventes

ethyl acetate

toluene

methanol

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturais refluxed for 20 hr
2. 2
   Lavadowashed with water, brine
3. 3
   Secadodried over Na2SO4
4. 4
   OtroAfter solvent removal by rotoevaporation
5. 5
   Otrothe crude product is purified by preparative TLC

Procedimiento

A mixture of 26 mg (0.083 mmol) of N-[4,8-dimethoxyquinoline-2-yl)carbonyl]-4-piperidone (prepared as described in Example 44), 14 mg (0.083 mmol) of 2-hydroxy-5-methoxybenzamide, and 0.020 mL of morpholine in a mixture of 0.2 mL of toluene and 0.6 mL of methanol is refluxed for 20 hr. The reaction mixture is diluted with ethyl acetate, and washed with water, brine, and dried over Na2SO4. After solvent removal by rotoevaporation, the crude product is purified by preparative TLC to give 17 mg (0.037 mmol, 45% yield) of 1′-[4,8-dimethoxyquinoline-2-yl)carbonyl]-6-methoxyspiro-[2H-1,3-benzoxazin-2,4′-piperidin]-4-(3H)-one (Compound 150): 1H NMR (DMSO-d6): δ 3.76 (s, 3H), 3.95 (s, 3H), 4.07 (s, 3H), 7.04 (d, 1H), 7.12 (d of d, 1H), 7.19 (s, 1H), 7.24 (m, 2H), 7.52 (d of d, 1H), 7.68 (d, 1H), and 8.85 ppm (s, 1H). MS m/z: 464.1 (M+H)+, 486.2 (M+Na)+.

Fuente