Hydrochloric Acid → (trans)-9-(3-bromo-4-fluorophenyl)-7-methyl-5,9-dihydro-3H-furo[3,4-b]pyrano[4,3-e]pyridine-1,8(4H,7H)-dione

HRID 478306노트

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HRID 478306 반응식
[Br:1][C:2]1[CH:3]=[C:4]([CH:9]2[C:14]([C:15]([O:17]C)=[O:16])=[C:13]([CH3:19])[NH:12][C:11]3[CH2:20][O:21][CH:22]([CH3:25])[C:23](=[O:24])[C:10]2=3)[CH:5]=[CH:6][C:7]=1[F:8].N1C=CC=CC=1.[Br-].[Br-].[Br-].[NH+]1C=CC=CC=1.[NH+]1C=CC=CC=1.[NH+]1C=CC=CC=1.Cl>C(Cl)(Cl)Cl.ClCCl>[Br:1][C:2]1[CH:3]=[C:4]([C@@H:9]2[C:10]3[C:23](=[O:24])[C@@H:22]([CH3:25])[O:21][CH2:20][C:11]=3[NH:12][C:13]3[CH2:19][O:17][C:15](=[O:16])[C:14]2=3)[CH:5]=[CH:6][C:7]=1[F:8]

참가 물질

7

반응물 4

HCID 313Hydrochloric AcidHCID 1049PyridineHCID 18000971methyl 4-(3-bromo-4-fluorophenyl)-2,6-dimethyl-5-oxo-4,5,6,8-tetrahydro-1H-pyrano[3,4-b]pyridine-3-carboxylateHCID 21124087Pyridiniumtribromide

생성물 1

HCID 70003743(trans)-9-(3-bromo-4-fluorophenyl)-7-methyl-5,9-dihydro-3H-furo[3,4-b]pyrano[4,3-e]pyridine-1,8(4H,7H)-dione

시약·촉매·용매 2

HCID 6212Chloroform용매HCID 6344Dichloromethane용매

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온도
-10 °C

실험 절차

The product from Example 84D (1.0 g, 2.5 mmol) was dissolved in chloroform (15 mL) under a nitrogen atmosphere, cooled to −10° C., treated with pyridine (0.24 mL, 3.0 mmol) and pyridinium tribromide (0.97 g, 3.0 mmol), stirred at −10° C. for 20 minutes, diluted with dichloromethane (100 mL) and treated with 1M HCl (10 mL). The layers were separated and the aqueous layer was extracted with dichloromethane (50 mL). The combined organic layers were dried (MgSO4), filtered, concentrated, heated to 130° C. under nitrogen for 15 minutes and cooled to ambient temperature. The residue was purified by chromatography on silica gel eluting with 38:1:1:40 ethyl acetate:formic acid:water:hexane to provide the title compound as the faster moving diasteriomer which was crystallized from dichloromethane. 1H NMR (DMSO-d6) δ 1.22 (d, 3H), 4.12 (q, 1H), 4.48 (d, 1H), 4.65 (d, 1H), 4.68 (s, 1H), 4.86 (dd, 1H), 4.99 (d, 1H), 7.24-7.28 (m, 2H), 7.48 (dd, 1H), 10.42 (bs, 1H);

후처리

  1. customThe layers were separated
  2. extractionthe aqueous layer was extracted with dichloromethane (50 mL)
  3. dry with materialThe combined organic layers were dried (MgSO4)
  4. filtrationfiltered
  5. concentrationconcentrated
  6. temperatureheated to 130° C. under nitrogen for 15 minutes
  7. temperaturecooled to ambient temperature
  8. customThe residue was purified by chromatography on silica gel eluting with 38:1:1:40 ethyl acetate

출처 및 근거

ORD 기록
ord-f430aede5dbe4ec79fb847f24686be3f
출처 데이터셋
uspto-grants-2003_11
특허 번호
US06642222B2

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