1H-Pyrazolo[1,2-a]pyridazine-3-carboxylic acid, 6-[[(1,1-dimethylethoxy)carbonyl]amino]-6-[(4-fluorophenyl)methyl]-5,6,7, 8-tetrahydro-5-oxo-, ethyl ester

Base Information

Chemical Name:1H-Pyrazolo[1,2-a]pyridazine-3-carboxylic acid, 6-[[(1,1-dimethylethoxy)carbonyl]amino]-6-[(4-fluorophenyl)methyl]-5,6,7, 8-tetrahydro-5-oxo-, ethyl ester
CAS No.:336192-85-9
Molecular Formula:C22H28FN3O5
Molecular Weight:433.48
Hs Code.:

1H-Pyrazolo[1,2-a]pyridazine-3-carboxylic acid,
6-[[(1,1-dimethylethoxy)carbonyl]amino]-6-[(4-fluorophenyl)methyl]-5,6,7,
8-tetrahydro-5-oxo-, ethyl ester

Synonyms:

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Chemical Property of 1H-Pyrazolo[1,2-a]pyridazine-3-carboxylic acid, 6-[[(1,1-dimethylethoxy)carbonyl]amino]-6-[(4-fluorophenyl)methyl]-5,6,7, 8-tetrahydro-5-oxo-, ethyl ester

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Technology Process of 1H-Pyrazolo[1,2-a]pyridazine-3-carboxylic acid, 6-[[(1,1-dimethylethoxy)carbonyl]amino]-6-[(4-fluorophenyl)methyl]-5,6,7, 8-tetrahydro-5-oxo-, ethyl ester

There total 11 articles about 1H-Pyrazolo[1,2-a]pyridazine-3-carboxylic acid, 6-[[(1,1-dimethylethoxy)carbonyl]amino]-6-[(4-fluorophenyl)methyl]-5,6,7, 8-tetrahydro-5-oxo-, ethyl ester 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:

: 7-tert-butoxycarbonylamino-7-(4-fluoro-benzyl)-8-oxo-2-(toluene-4-sulfonyl)-hexahydro-pyrazolo[1,2-a]pyridazine-1-carboxylic acid ethyl ester

: 336192-85-9
7-tert-butoxycarbonylamino-7-(4-fluoro-benzyl)-8-oxo-5,6,7,8-tetrahydro-3H-pyrazolo[1,2-a]pyridazine-1-carboxylic acid ethyl ester

Guidance literature:: With 1,8-diazabicyclo[5.4.0]undec-7-ene; In dichloromethane; at 0 ℃;
DOI:10.1016/S0040-4039(00)02229-2

Reference yield:

: 24424-99-5
di-tert-butyl dicarbonate

: 336192-85-9
7-tert-butoxycarbonylamino-7-(4-fluoro-benzyl)-8-oxo-5,6,7,8-tetrahydro-3H-pyrazolo[1,2-a]pyridazine-1-carboxylic acid ethyl ester

Guidance literature:: Multi-step reaction with 7 steps

1: Na₂CO₃ / tetrahydrofuran; H₂O

2: O₃; Me₂S / CH₂Cl₂; methanol / -78 °C

3: NH₂NH₂ / tetrahydrofuran / 48 h / Heating

4: NaBH₃CN; aq. HCl / methanol

5: Heating

6: 1,2-dichloro-ethane / 36 h / Heating

7: DBU / CH₂Cl₂ / 0 °C

With hydrogenchloride; dimethylsulfide; sodium cyanoborohydride; sodium carbonate; ozone; 1,8-diazabicyclo[5.4.0]undec-7-ene; hydrazine; In tetrahydrofuran; methanol; dichloromethane; water; 1,2-dichloro-ethane;
DOI:10.1016/S0040-4039(00)02229-2

Reference yield:

: 459-46-1
4-Fluorobenzyl bromide

: 336192-85-9
7-tert-butoxycarbonylamino-7-(4-fluoro-benzyl)-8-oxo-5,6,7,8-tetrahydro-3H-pyrazolo[1,2-a]pyridazine-1-carboxylic acid ethyl ester

Guidance literature:: Multi-step reaction with 10 steps

1: LDA / tetrahydrofuran / -78 °C

2: KHMDS / tetrahydrofuran

3: aq. HCl / methanol

4: Na₂CO₃ / tetrahydrofuran; H₂O

5: O₃; Me₂S / CH₂Cl₂; methanol / -78 °C

6: NH₂NH₂ / tetrahydrofuran / 48 h / Heating

7: NaBH₃CN; aq. HCl / methanol

8: Heating

9: 1,2-dichloro-ethane / 36 h / Heating

10: DBU / CH₂Cl₂ / 0 °C

With hydrogenchloride; dimethylsulfide; potassium hexamethylsilazane; sodium cyanoborohydride; sodium carbonate; ozone; 1,8-diazabicyclo[5.4.0]undec-7-ene; hydrazine; lithium diisopropyl amide; In tetrahydrofuran; methanol; dichloromethane; water; 1,2-dichloro-ethane;
DOI:10.1016/S0040-4039(00)02229-2