5-Chloro-5-methyl-3-phenyl-5,6-dihydro-pyrrolo[1,2-b]pyrazol-4-one

Base Information

• Chemical Name: 5-Chloro-5-methyl-3-phenyl-5,6-dihydro-pyrrolo[1,2-b]pyrazol-4-one
• CAS No.: 159144-44-2
• Molecular Formula: C₁₃H₁₁ClN₂O
• Molecular Weight: 246.696
• Mol file: 159144-44-2.mol

Synonyms:5-Chloro-5-methyl-3-phenyl-5,6-dihydro-pyrrolo[1,2-b]pyrazol-4-one

Chemical Property of 5-Chloro-5-methyl-3-phenyl-5,6-dihydro-pyrrolo[1,2-b]pyrazol-4-one

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of 5-Chloro-5-methyl-3-phenyl-5,6-dihydro-pyrrolo[1,2-b]pyrazol-4-one

There total 1 articles about 5-Chloro-5-methyl-3-phenyl-5,6-dihydro-pyrrolo[1,2-b]pyrazol-4-one which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 77.0%

5-hydroxy-5-methyl-4-oxo-3-phenylpyrrolidino<1,2-b>pyrazole (123791-74-2) → 5-Chloro-5-methyl-3-phenyl-5,6-dihydro-pyrrolo[1,2-b]pyrazol-4-one (159144-44-2)

Guidance literature:

With sulfuryl dichloride; In chloroform; for 3h; Heating;

DOI:10.1007/BF01164730

Reference yield: 94.0%

5-Chloro-5-methyl-3-phenyl-5,6-dihydro-pyrrolo[1,2-b]pyrazol-4-one (159144-44-2) → (4S,5S)-5-Chloro-5-methyl-3-phenyl-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-4-ol

Guidance literature:

With sodium tetrahydroborate; In methanol; for 0.166667h;

DOI:10.1007/BF01164730

Reference yield:

5-Chloro-5-methyl-3-phenyl-5,6-dihydro-pyrrolo[1,2-b]pyrazol-4-one (159144-44-2) → 5-Methyl-3-phenyl-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazole

Guidance literature:

Multi-step reaction with 3 steps

1: 94 percent / NaBH₄ / methanol / 0.17 h

2: 90 percent / 50percent aq. KOH / methanol; dioxane / 48 h / Ambient temperature

3: 1.) hydrazine hydrate, 2.) KOH / 1.) diethylene glycol, reflux, 1 h, 2.) diethylene glycol,150-180 deg C, 2 h

With potassium hydroxide; sodium tetrahydroborate; hydrazine hydrate; In 1,4-dioxane; methanol;

DOI:10.1007/BF01164730

upstream raw materials:

5-hydroxy-5-methyl-4-oxo-3-phenylpyrrolidino<1,2-b>pyrazole

Downstream raw materials:

5-Methyl-3-phenyl-5,6-dihydro-pyrrolo[1,2-b]pyrazol-4-one