2-Aminothiazole → (E)-3-cyclopentyl-2-[3-methanesulfonyl-4-(5-methyl-tetrazol-1-yl)-phenyl]-N-thiazol-2-yl-acrylamide

HRID 2306452ノート

反応式

HRID 2306452 の反応式
C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.BrN1C(=O)CCC1=O.[CH:28]1(/[CH:33]=[C:34](\[C:38]2[CH:43]=[CH:42][C:41]([N:44]3[C:48]([CH3:49])=[N:47][N:46]=[N:45]3)=[C:40]([S:50]([CH3:53])(=[O:52])=[O:51])[CH:39]=2)/[C:35]([OH:37])=O)[CH2:32][CH2:31][CH2:30][CH2:29]1.[NH2:54][C:55]1[S:56][CH:57]=[CH:58][N:59]=1>C(Cl)Cl>[CH:28]1(/[CH:33]=[C:34](\[C:38]2[CH:43]=[CH:42][C:41]([N:44]3[C:48]([CH3:49])=[N:47][N:46]=[N:45]3)=[C:40]([S:50]([CH3:53])(=[O:52])=[O:51])[CH:39]=2)/[C:35]([NH:54][C:55]2[S:56][CH:57]=[CH:58][N:59]=2)=[O:37])[CH2:29][CH2:30][CH2:31][CH2:32]1

参加物

6

反応物 4

HCID 21552-AminothiazoleHCID 11776TriphenylphosphineHCID 67184N-bromobutanimideHCID 69692355(E)-3-cyclopentyl-2-[3-methanesulfonyl-4-(5-methyl-tetrazol-1-yl)-phenyl]-acrylic acid

生成物 1

HCID 10276228(E)-3-cyclopentyl-2-[3-methanesulfonyl-4-(5-methyl-tetrazol-1-yl)-phenyl]-N-thiazol-2-yl-acrylamide収率 18.3%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

反応条件

温度
0 °C

実験手順

A solution of triphenylphosphine (262 mg, 1 mmol) in methylene chloride (6 mL) was cooled to 0° C. and then treated with N-bromosuccinimide (178 mg, 1 mmol). The reaction mixture was stirred at 0° C. for 30 min and then treated with (E)-3-cyclopentyl-2-[3-methanesulfonyl-4-(5-methyl-tetrazol-1-yl)-phenyl]-acrylic acid (190 mg, 0.5 mmol). The reaction mixture was stirred for 15 min at 0° C. and then allowed to warm to 25° C. where it was stirred for 1.5 h. The reaction mixture was then treated with 2-aminothiazole (250 mg, 2.5 mmol), and the resulting suspension was stirred for 2 d at 25° C. The reaction mixture was then concentrated in vacuo to remove methylene chloride, and the residue was diluted with ethyl acetate (20 mL) and water (30 mL). The two layers were separated, and the aqueous layer was extracted with ethyl acetate (1×15 mL). The combined organic extracts were successively washed with a saturated aqueous sodium bicarbonate solution (1×50 mL) and a saturated aqueous sodium chloride solution (1×50 mL), dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. Biotage chromatography (FLASH 40S, Silica, 3/1 hexanes/ethyl acetate) afforded (E)-3-cyclopentyl-2-[3-methanesulfonyl-4-(5-methyl-tetrazol-1-yl)-phenyl]-N-thiazol-2-yl-acrylamide (42 mg, 18%) as an amorphous white solid: EI-HRMS m/e calcd for C20H22N6O3S2 (M+) 458.1195, found 458.1192.

後処理

  1. stirringThe reaction mixture was stirred for 15 min at 0° C.
  2. temperatureto warm to 25° C. where it
  3. stirringwas stirred for 1.5 h
  4. stirringthe resulting suspension was stirred for 2 d at 25° C
  5. concentrationThe reaction mixture was then concentrated in vacuo
  6. customto remove methylene chloride
  7. additionthe residue was diluted with ethyl acetate (20 mL) and water (30 mL)
  8. customThe two layers were separated
  9. extractionthe aqueous layer was extracted with ethyl acetate (1×15 mL)
  10. washThe combined organic extracts were successively washed with a saturated aqueous sodium bicarbonate solution (1×50 mL)
  11. dry with materiala saturated aqueous sodium chloride solution (1×50 mL), dried over anhydrous magnesium sulfate
  12. filtrationfiltered
  13. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-9f0c24cd014a4f0382779ec82f78d682
出典データセット
uspto-grants-2002_08
特許番号
US06441180B1

反応ノート

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