4-Benzyl-7-chloro-9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-2-carboxylic acid

Base Information

Chemical Name:4-Benzyl-7-chloro-9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-2-carboxylic acid
CAS No.:77422-96-9
Molecular Formula:C₁₈H₁₂ClN₃O₃
Molecular Weight:353.765
Hs Code.:

Synonyms:4-Benzyl-7-chloro-9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-2-carboxylic acid

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Chemical Property of 4-Benzyl-7-chloro-9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-2-carboxylic acid

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Technology Process of 4-Benzyl-7-chloro-9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-2-carboxylic acid

There total 4 articles about 4-Benzyl-7-chloro-9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-2-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: 62.0%

: 77556-55-9
4-Benzyl-7-chloro-9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-2-carboxylic acid ethyl ester

: 77422-96-9
4-Benzyl-7-chloro-9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-2-carboxylic acid

Guidance literature:: With sodium hydroxide; In methanol; for 0.5h; Heating;
DOI:10.1021/jm00138a019

Reference yield:

: 4743-17-3
5-Chloroisatoic anhydride

: 77422-96-9
4-Benzyl-7-chloro-9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-2-carboxylic acid

Guidance literature:: Multi-step reaction with 3 steps

1: 42 percent / Na₂CO₃ / dimethylformamide / 18 h / 20 - 25 °C

2: 1.) NaH / 1.) DMF, from -10 deg C to 0 deg C, 2 h, 2.) DMF, a) RT, overnight, b) 90 deg C, 2 h

3: 62 percent / 1 N NaOH / methanol / 0.5 h / Heating

With sodium hydroxide; sodium hydride; sodium carbonate; In methanol; N,N-dimethyl-formamide;
DOI:10.1021/jm00138a019

Reference yield:

: 57384-84-6
1-benzyl-6-chloro-1H-benzo[d][1,3]oxazine-2,4-dione

: 77422-96-9
4-Benzyl-7-chloro-9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-2-carboxylic acid

Guidance literature:: Multi-step reaction with 2 steps

1: 1.) NaH / 1.) DMF, from -10 deg C to 0 deg C, 2 h, 2.) DMF, a) RT, overnight, b) 90 deg C, 2 h

2: 62 percent / 1 N NaOH / methanol / 0.5 h / Heating

With sodium hydroxide; sodium hydride; In methanol;
DOI:10.1021/jm00138a019