Acetic Anhydride → tert-butyl 3-[2-(acetyloxy)ethoxy]-5-amino-1-methyl-1H-pyrazole-4-carboxylate

HRID 1062784노트

반응식

HRID 1062784 반응식
[NH2:1][C:2]1[N:6]([CH3:7])[N:5]=[C:4]([O:8][CH2:9][CH2:10][OH:11])[C:3]=1[C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13].C(N(CC)CC)C.[C:26](OC(=O)C)(=[O:28])[CH3:27]>O1CCCC1.CN(C)C1C=CN=CC=1>[C:26]([O:11][CH2:10][CH2:9][O:8][C:4]1[C:3]([C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13])=[C:2]([NH2:1])[N:6]([CH3:7])[N:5]=1)(=[O:28])[CH3:27]

참가 물질

6

반응물 3

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 22281924tert-butyl 5-amino-3-(2-hydroxyethoxy)-1-methyl-1H-pyrazole-4-carboxylate

생성물 1

HCID 22281904tert-butyl 3-[2-(acetyloxy)ethoxy]-5-amino-1-methyl-1H-pyrazole-4-carboxylate

시약·촉매·용매 2

HCID 142844-(Dimethylamino)pyridine촉매HCID 8028Tetrahydrofuran용매

실험 절차

To tert-butyl 5-amino-3-(2-hydroxyethoxy)-1-methyl-1H-pyrazole-4-carboxylate (Preparation 11) (60 g) in tetrahydrofuran (500 ml), under nitrogen and at room temperature, was added triethylamine (41.7 ml), 4-dimethylaminopyridine (400 mg) followed by acetic anhydride (28.6 ml) dropwise. The reaction was stirred at room temperature overnight and was then concentrated under reduced pressure. The residue was diluted with ethyl acetate (300 ml) and washed with brine (2×100 ml). The organics were dried with magnesium sulfate, filtered and concentrated under reduced pressure to yield the desired product as white solid (71 g).

후처리

  1. concentrationwas then concentrated under reduced pressure
  2. additionThe residue was diluted with ethyl acetate (300 ml)
  3. washwashed with brine (2×100 ml)
  4. dry with materialThe organics were dried with magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure

출처 및 근거

ORD 기록
ord-5fa159a825c74d5b9eaeae53005370b6
출처 데이터셋
uspto-grants-2005_11
특허 번호
US06962923B2

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