N-[(4-methoxyphenyl)methyl]-1,3-thiazol-2-amine → 4-(2-cyano-4-(trifluoromethyl)phenyl)-6-fluoro-N-(thiazol-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine-7-sulfonamide

HRID 528605

反応式

HRID 528605 の反応式
COC1C=CC(C[NH:8][C:9]2[S:10][CH:11]=[CH:12][N:13]=2)=CC=1.C[Si]([N-][Si](C)(C)C)(C)C.[Li+].[C:26]([C:28]1[CH:33]=[C:32]([C:34]([F:37])([F:36])[F:35])[CH:31]=[CH:30][C:29]=1[N:38]1[CH2:43][CH2:42][O:41][C:40]2[CH:44]=[C:45]([S:49](Cl)(=[O:51])=[O:50])[C:46]([F:48])=[CH:47][C:39]1=2)#[N:27]>C1COCC1.CCOC(C)=O>[C:26]([C:28]1[CH:33]=[C:32]([C:34]([F:37])([F:36])[F:35])[CH:31]=[CH:30][C:29]=1[N:38]1[CH2:43][CH2:42][O:41][C:40]2[CH:44]=[C:45]([S:49]([NH:8][C:9]3[S:10][CH:11]=[CH:12][N:13]=3)(=[O:51])=[O:50])[C:46]([F:48])=[CH:47][C:39]1=2)#[N:27]

参加物

6

反応物 3

HCID 578640N-[(4-methoxyphenyl)methyl]-1,3-thiazol-2-amineHCID 2733832Lithium HexamethyldisilazideHCID 89761698HCID 89761698、化合物

生成物 1

HCID 717119794-(2-cyano-4-(trifluoromethyl)phenyl)-6-fluoro-N-(thiazol-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine-7-sulfonamide収率 56.6%

試薬・触媒・溶媒 2

HCID 8028Tetrahydrofuran溶媒3 回HCID 8857Ethyl Acetate溶媒

実験手順

To a vial charged with N-(4-methoxybenzyl)thiazol-2-amine (2.83 g, 12.86 mmol) was added THF (38.2 ml) and the mixture cooled in an ice water bath prior to the addition of lithium bis(trimethylsilyl)amide, 1.0M solution in tetrahydrofuran (14.03 ml, 14.03 mmol), faster than dropwise. After 15 min, a solution of 4-(2-cyano-4-(trifluoromethyl)phenyl)-6-fluoro-3,4-dihydro-2H-benzo[b][1,4]oxazine-7-sulfonyl chloride (4.92 g, 11.69 mmol) in THF (30 ml) was added. The mixture was allowed to warm to rt over 1.5 h, providing a brown solution and product as the primary species according to LC-MS (m/z=605). The solution was added to ice, diluted with EtOAc and extracted with water (brine added to help resolve emulsion). The layers were separated and the aqueous phase was extracted with EtOAc. The combined organics were dried with Na2SO4, filtered, and dried under reduced pressure. To the crude material was added DCM (70 ml) and the resulting light brown solution cooled in an ice water bath prior to the addition of TFA (20 ml) and the mixture stirred at 0° C. for 20 mins and at room temperature for 1 h affording a purplish solution. The mixture was concentrated under reduced pressure and the resulting brownish oil purified with a 330 g ISCO gold column ramping EtOAc in heptane (0-45%, then isocratic at 45% with 10% DCM isocratic throughout, sample loaded with DCM providing product (˜3.9 g) as a slightly off-white solid. The solid was triturated with MeOH to afford a white solid, 4-(2-cyano-4-(trifluoromethyl)phenyl)-6-fluoro-N-(thiazol-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine-7-sulfonamide (3.208 g, 6.62 mmol, 56.6% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm 3.80-3.88 (m, 2 H) 4.28-4.35 (m, 2 H) 6.64 (d, J=11.64 Hz, 1 H) 6.84 (d, J=4.69 Hz, 1 H) 7.23 (d, J=6.75 Hz, 1 H) 7.27 (d, J=4.60 Hz, 1 H) 7.77 (d, J=8.61 Hz, 1 H) 8.09 (dd, J=8.90, 1.96 Hz, 1 H) 8.41 (d, J=1.66 Hz, 1 H) 12.81 (s, 1 H). m/z (ESI) 485.2 (M+H)+.

後処理

  1. temperaturethe mixture cooled in an ice water bath
  2. customproviding a brown solution and product as the primary species
  3. additionThe solution was added to ice
  4. extractionextracted with water (brine added to help resolve emulsion)
  5. customThe layers were separated
  6. extractionthe aqueous phase was extracted with EtOAc
  7. dry with materialThe combined organics were dried with Na2SO4
  8. filtrationfiltered
  9. customdried under reduced pressure
  10. additionTo the crude material was added DCM (70 ml)
  11. temperaturethe resulting light brown solution cooled in an ice water bath
  12. additionto the addition of TFA (20 ml)
  13. customaffording a purplish solution
  14. concentrationThe mixture was concentrated under reduced pressure
  15. customthe resulting brownish oil purified with a 330 g ISCO gold column
  16. customThe solid was triturated with MeOH

出典と根拠

ORDレコード
ord-d36dc5cf092b43249e2906517e5d2c91
出典データセット
uspto-grants-2016_05
特許番号
US09346798B2

関連ノート

読み込み中…