Phosphorus oxychloride → 1-Acetyl-2(3-isopropyl-1-methyl-5-pyrazolyl)amino-2-imidazoline

HRID 224803

Reaktionsgleichung

Reaktionsgleichung von HRID 224803
[NH2:1][C:2]1[N:6]([CH3:7])[N:5]=[C:4]([CH:8]([CH3:10])[CH3:9])[CH:3]=1.P(Cl)(Cl)(Cl)=O.[C:16]([N:19]1[CH2:23][CH2:22][NH:21][C:20]1=O)(=[O:18])[CH3:17]>>[C:16]([N:19]1[CH2:23][CH2:22][N:21]=[C:20]1[NH:1][C:2]1[N:6]([CH3:7])[N:5]=[C:4]([CH:8]([CH3:10])[CH3:9])[CH:3]=1)(=[O:18])[CH3:17]

Komponenten

4

Edukt 3

HCID 24813Phosphorus oxychlorideHCID 79350N-AcetylimidazolidinoneHCID 27594993-Isopropyl-1-methyl-1H-pyrazol-5-amine

Produkt 1

HCID 127637871-Acetyl-2(3-isopropyl-1-methyl-5-pyrazolyl)amino-2-imidazoline

Versuchsvorschrift

5-amino-3-isopropyl-1-methyl pyrazole (described in British Pat. No. 1,057,740) (19.3 g) was dissolved in 180 ml. phosphorus oxychloride (POCl3). 1-Acetyl-2-imidazolidinone (J. Chem Soc 1964, 178) (20.1 g) was added. This reaction mixture was stirred at 55° for 40 hr. The solvents were concentrated in vacuum, ice and methylene chloride were added and the mixture neutralized with 25% sodium hydroxide in water. The methylene chloride layer was dried over MgSO4 and then concentrated and the residue crystallized from isopropyl alcohol and ether to give 12.73 g. of product, mp 145°-147° C.

Aufarbeitung

  1. dissolution1,057,740) (19.3 g) was dissolved in 180 ml
  2. concentrationThe solvents were concentrated in vacuum, ice and methylene chloride
  3. additionwere added
  4. dry with materialThe methylene chloride layer was dried over MgSO4
  5. concentrationconcentrated
  6. customthe residue crystallized from isopropyl alcohol and ether
  7. customto give 12.73 g

Quellen und Nachweise

ORD-Eintrag
ord-7fc93ac678ee4782b5fb630a19c1546f
Quelldatensatz
uspto-grants-1980_11
Patentnummer
US04234594

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