Diisopropylethylamine → 4-Chloro-1-[2-(3,3-difluoropyrrolidin-1-yl)ethyl]-3,5-diphenyl-pyrazolo[3,4-c]pyridazine

HRID 588625Notes

Reaction equation

HRID 588625 reaction equation
[Cl:1][C:2]1[C:7]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)=[N:6][N:5]=[C:4]2[N:14]([CH2:23][CH2:24]I)[N:15]=[C:16]([C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[C:3]=12.Cl.[F:27][C:28]1([F:33])[CH2:32][CH2:31][NH:30][CH2:29]1.CCN(C(C)C)C(C)C>C(Cl)Cl>[Cl:1][C:2]1[C:7]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)=[N:6][N:5]=[C:4]2[N:14]([CH2:23][CH2:24][N:30]3[CH2:31][CH2:32][C:28]([F:33])([F:27])[CH2:29]3)[N:15]=[C:16]([C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[C:3]=12

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 249034823,3-Difluoropyrrolidine hydrochlorideHCID 866970204-chloro-1-(2-iodoethyl)-3,5-diphenyl-1H-pyrazolo[3,4-c]pyridazine

Product 1

HCID 867173204-Chloro-1-[2-(3,3-difluoropyrrolidin-1-yl)ethyl]-3,5-diphenyl-pyrazolo[3,4-c]pyridazineYield 27.8%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of 4-chloro-1-(2-iodoethyl)-3,5-diphenyl-1H-pyrazolo[3,4-c]pyridazine (91 mg, 0.2 mmol) in dry CH2Cl2 (2 mL) was added to 3,3-difluoropyrrolidine hydrochloride (143 mg, 1 mmol), DIPEA (0.2 mL, 1.1 mmol) was added and the reaction stirred for 5 days. The resultant residue was purified using chromatography (silica gel, gradient 20 to 50% ethyl acetate/isohexane, followed by preparative HPLC to provide Compound IIv as a white solid (24.5 mg).

Workup

  1. additionwas added
  2. customThe resultant residue was purified

Sources & evidence

ORD record
ord-97a167dc0777455e97072bc13dc7b5dd
Source dataset
uspto-grants-2016_01
Patent number
US09227976B2

Reaction notes

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