Tetrahydrofuran → (S)-2-amino-7'-(pyridin-3-yl)-5H-spiro[oxazole-4,9'-xanthen]-2'-ol

HRID 1970365ノート

反応式

HRID 1970365 の反応式
[NH2:1][C:2]1[O:3][CH2:4][C@:5]2([N:21]=1)[C:18]1[CH:17]=[C:16](Br)[CH:15]=[CH:14][C:13]=1[O:12][C:11]1[C:6]2=[CH:7][C:8]([OH:20])=[CH:9][CH:10]=1.[N:22]1[CH:27]=[CH:26][CH:25]=[C:24](B(O)O)[CH:23]=1.C1COCC1.C(=O)([O-])[O-].[K+].[K+]>C(Cl)Cl.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:1][C:2]1[O:3][CH2:4][C@@:5]2([N:21]=1)[C:6]1[CH:7]=[C:8]([OH:20])[CH:9]=[CH:10][C:11]=1[O:12][C:13]1[C:18]2=[CH:17][C:16]([C:24]2[CH:23]=[N:22][CH:27]=[CH:26][CH:25]=2)=[CH:15][CH:14]=1

参加物

7

反応物 4

HCID 8028TetrahydrofuranHCID 11430Potassium CarbonateHCID 27343783-Pyridinylboronic acidHCID 58466172(R)-2-amino-2'-bromo-5H-spiro[oxazole-4,9'-xanthen]-7'-ol

生成物 1

HCID 58466221(S)-2-amino-7'-(pyridin-3-yl)-5H-spiro[oxazole-4,9'-xanthen]-2'-ol

試薬・触媒・溶媒 2

HCID 178418397HCID 178418397、化合物触媒HCID 6344Dichloromethane溶媒

反応条件

温度
100 °C

実験手順

A 350-mL pressure vessel was charged with (R)-2-amino-2′-bromo-5H-spiro[oxazole-4,9′-xanthen]-7′-ol (4.00 g, 11.52 mmol), 3-pyridylboronic acid (3.54 g, 28.8 mmol), tetrakis(triphenylphosphine)palladium(0) (1.331 g, 1.152 mmol), THF (57.6 mL), and potassium carbonate (2.0M aq. solution) (28.8 mL, 57.6 mmol). The vessel was sealed and heated to 100° C. and stirred for 2 hours. The layers were partitioned between EtOAc (20 mL) and water (20 mL). The layers were separated, and the aqueous layer was extracted with EtOAc (2×20 mL). The combined organic layers were washed with brine (emulsion!), dried over sodium sulfate and filtered with the aid of 10% MeOH/DCM. The filtrate was evaporated to give a yellow solid. This solid was taken up in minimal DCM and sonicated for 5 min. The solid was filtered and washed with DCM (30 mL). Filtering and washing with DCM afforded (S)-2-amino-7′-(pyridin-3-yl)-5H-spiro[oxazole-4,9′-xanthen]-2′-ol as a pale-yellow solid

後処理

  1. customThe vessel was sealed
  2. customThe layers were partitioned between EtOAc (20 mL) and water (20 mL)
  3. customThe layers were separated
  4. extractionthe aqueous layer was extracted with EtOAc (2×20 mL)
  5. washThe combined organic layers were washed with brine (emulsion!)
  6. dry with materialdried over sodium sulfate
  7. filtrationfiltered with the aid of 10% MeOH/DCM
  8. customThe filtrate was evaporated
  9. customto give a yellow solid
  10. customsonicated for 5 min
  11. filtrationThe solid was filtered
  12. washwashed with DCM (30 mL)
  13. filtrationFiltering
  14. washwashing with DCM

出典と根拠

ORDレコード
ord-b4d1e6d6ecd74fb6b5206ac42d1134eb
出典データセット
uspto-grants-2013_04
特許番号
US08426447B2

反応ノート

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