(R)-4-(tert-butoxycarbonyl)-7-(3,4-dichlorophenyl)-2,5-dimethyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid

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Chemical Name:(R)-4-(tert-butoxycarbonyl)-7-(3,4-dichlorophenyl)-2,5-dimethyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid
CAS No.:1369959-01-2
Molecular Formula:C₂₀H₂₁Cl₂N₃O₄
Molecular Weight:438.31
Hs Code.:

Synonyms:(R)-4-(tert-butoxycarbonyl)-7-(3,4-dichlorophenyl)-2,5-dimethyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid

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Chemical Property of (R)-4-(tert-butoxycarbonyl)-7-(3,4-dichlorophenyl)-2,5-dimethyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid

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Technology Process of (R)-4-(tert-butoxycarbonyl)-7-(3,4-dichlorophenyl)-2,5-dimethyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid

There total 4 articles about (R)-4-(tert-butoxycarbonyl)-7-(3,4-dichlorophenyl)-2,5-dimethyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-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: 87.0%

: 1369959-21-6
(R)-4-tert-butyl-6-methyl-7-(3 ,4-dichlorophenyl)-2, 5-dimethylpyrazolo[1,5-a]pyrimidine-4,6(7H)-dicarboxylate

: 1369959-01-2
(R)-4-(tert-butoxycarbonyl)-7-(3,4-dichlorophenyl)-2,5-dimethyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid

Guidance literature:: (R)-4-tert-butyl-6-methyl-7-(3 ,4-dichlorophenyl)-2, 5-dimethylpyrazolo[1,5-a]pyrimidine-4,6(7H)-dicarboxylate; With lithium hydroxide; In tetrahydrofuran; water; at 20 ℃; for 15h; Inert atmosphere;

With hydrogenchloride; In tetrahydrofuran; water; Inert atmosphere;
DOI:10.1021/jm201386u

Reference yield:

: 6287-38-3
3,4-dichlorobenzaldehyde

: 1369959-01-2
(R)-4-(tert-butoxycarbonyl)-7-(3,4-dichlorophenyl)-2,5-dimethyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid

Guidance literature:: Multi-step reaction with 4 steps

1.1: piperidine / tetrahydrofuran; n-heptane / Heating; Inert atmosphere

2.1: dmap / tetrahydrofuran / 2 h / 20 °C / Inert atmosphere

3.1: Chiral cell AD column / ethanol; n-heptane / Inert atmosphere; Resolution of racemate

4.1: lithium hydroxide / tetrahydrofuran; water / 15 h / 20 °C / Inert atmosphere

4.2: Inert atmosphere

With piperidine; dmap; lithium hydroxide; In tetrahydrofuran; ethanol; n-heptane; water; 1.1: Biginelli reaction;
DOI:10.1021/jm201386u

Reference yield:

: 1369959-19-2
methyl 7-(3,4-dichlorophenyl)-2,5-dimethyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylate

: 1369959-01-2
(R)-4-(tert-butoxycarbonyl)-7-(3,4-dichlorophenyl)-2,5-dimethyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid

Guidance literature:: Multi-step reaction with 3 steps

1.1: dmap / tetrahydrofuran / 2 h / 20 °C / Inert atmosphere

2.1: Chiral cell AD column / ethanol; n-heptane / Inert atmosphere; Resolution of racemate

3.1: lithium hydroxide / tetrahydrofuran; water / 15 h / 20 °C / Inert atmosphere

3.2: Inert atmosphere

With dmap; lithium hydroxide; In tetrahydrofuran; ethanol; n-heptane; water;
DOI:10.1021/jm201386u