Реакция #1726712

Уравнение реакции

4-piperidone

3-hydroxy-2-naphthalenecarboxamide

morpholine

→

Compound 159

spiro[2H-naphtho[2,3-e]-1,3-oxazin-2,4′-piperidin]-4-(3H)-one

Растворители

ethyl acetate

toluene

methanol

Условия реакции

Обработка

1. 1
   Температураis refluxed for 20 hr
2. 2
   Промывкаwashed with water, brine
3. 3
   Сушкаdried over Na2SO4
4. 4
   ДругоеAfter solvent removal by rotoevaporation
5. 5
   Другоеthe crude product is purified by preparative TLC

Методика

A mixture of 26 mg (0.083 mmol) of N-[4,8-dimethoxyquinoline-2-yl)carbonyl]-4-piperidone (prepared as described in Example 44), 15.5 mg (0.083 mmol) of 3-hydroxy-2-naphthalenecarboxamide, 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 11 mg (0.023 mmol, 27% yield) of 1′-[4,8-dimethoxyquinoline-2-yl)carbonyl]spiro[2H-naphtho[2,3-e]-1,3-oxazin-2,4′-piperidin]-4-(3H)-one (Compound 159): 1H NMR (DMSO-d6): δ 3.95 (s, 3H), 4.07 (s, 3H), 7.20 (s, 1H), 7.23 (d, 1H), 7.44 (d of d, 1H), 7.55 (m, 3H), 7.67 (d, 1H), 8.04 (d, 1H), 8.46 (s, 1H), and 9.09 ppm (s, 1H). MS m/z: 484.0 (M+H)+, 506.0 (M+Na)+.

Источник