2-methyl-5-(4-methylene-5-oxo-2-phenyl-tetrahydro-furan-2-ylmethoxy)-2H-pyrazole-3-carboxylic acid

Base Information

Chemical Name:2-methyl-5-(4-methylene-5-oxo-2-phenyl-tetrahydro-furan-2-ylmethoxy)-2H-pyrazole-3-carboxylic acid
CAS No.:692259-27-1
Molecular Formula:C₁₇H₁₆N₂O₅
Molecular Weight:328.324
Hs Code.:

2-methyl-5-(4-methylene-5-oxo-2-phenyl-tetrahydro-furan-2-ylmethoxy)-2<i>H</i>-pyrazole-3-carboxylic acid

Synonyms:2-methyl-5-(4-methylene-5-oxo-2-phenyl-tetrahydro-furan-2-ylmethoxy)-2H-pyrazole-3-carboxylic acid

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Chemical Property of 2-methyl-5-(4-methylene-5-oxo-2-phenyl-tetrahydro-furan-2-ylmethoxy)-2H-pyrazole-3-carboxylic acid

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Technology Process of 2-methyl-5-(4-methylene-5-oxo-2-phenyl-tetrahydro-furan-2-ylmethoxy)-2H-pyrazole-3-carboxylic acid

There total 6 articles about 2-methyl-5-(4-methylene-5-oxo-2-phenyl-tetrahydro-furan-2-ylmethoxy)-2H-pyrazole-3-carboxylic acid 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: 95.0%

: 692259-20-4
2-methyl-5-(4-methylene-5-oxo-2-phenyltetrahydrofuran-2-ylmethoxy)-2H-pyrazole-3-carboxylic acid tert-butyl ester

: 692259-27-1
2-methyl-5-(4-methylene-5-oxo-2-phenyl-tetrahydro-furan-2-ylmethoxy)-2H-pyrazole-3-carboxylic acid

Guidance literature:: With trifluoroacetic acid; In dichloromethane; at 20 ℃; for 3h;
DOI:10.1021/jm031104y

Reference yield:

: 70-11-1
α-bromoacetophenone

: 692259-27-1
2-methyl-5-(4-methylene-5-oxo-2-phenyl-tetrahydro-furan-2-ylmethoxy)-2H-pyrazole-3-carboxylic acid

Guidance literature:: Multi-step reaction with 5 steps

1.1: NaH / dimethylformamide / 1.5 h / 0 - 20 °C

1.2: 70 percent / dimethylformamide / 18 h / 20 °C

2.1: 96 percent / aq. LiOH / tetrahydrofuran; methanol / 1 h / 20 °C

3.1: BTEAC; K₂CO₃ / dimethylformamide / 24 h / 55 °C

4.1: 2.69 g / Zn; hydroquinone / tetrahydrofuran / 24 h / Heating

5.1: 95 percent / CF₃COOH / CH₂Cl₂ / 3 h / 20 °C

With lithium hydroxide; N-benzyl-N,N,N-triethylammonium chloride; sodium hydride; potassium carbonate; hydroquinone; trifluoroacetic acid; zinc; In tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide; 4.1: Reformatsky-type condensation;
DOI:10.1021/jm031104y

Reference yield:

: 52867-42-2
5-hydroxy-2-methyl-2H-pyrazole-3-carboxylic acid methyl ester

: 692259-27-1
2-methyl-5-(4-methylene-5-oxo-2-phenyl-tetrahydro-furan-2-ylmethoxy)-2H-pyrazole-3-carboxylic acid

Guidance literature:: Multi-step reaction with 5 steps

1.1: NaH / dimethylformamide / 1.5 h / 0 - 20 °C

1.2: 70 percent / dimethylformamide / 18 h / 20 °C

2.1: 96 percent / aq. LiOH / tetrahydrofuran; methanol / 1 h / 20 °C

3.1: BTEAC; K₂CO₃ / dimethylformamide / 24 h / 55 °C

4.1: 2.69 g / Zn; hydroquinone / tetrahydrofuran / 24 h / Heating

5.1: 95 percent / CF₃COOH / CH₂Cl₂ / 3 h / 20 °C

With lithium hydroxide; N-benzyl-N,N,N-triethylammonium chloride; sodium hydride; potassium carbonate; hydroquinone; trifluoroacetic acid; zinc; In tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide; 4.1: Reformatsky-type condensation;
DOI:10.1021/jm031104y