Benzenesulfonic Acid → Sofinicline Benzenesulfonate

HRID 898729Notes

Reaction equation

HRID 898729 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([N:9]2[CH2:15][C@@H:14]3[C@@H:11]([CH2:12][N:13]3C(OC(C)(C)C)=O)[CH2:10]2)[CH:5]=[N:6][C:7]=1[Cl:8].[C:23]1([S:29]([OH:32])(=[O:31])=[O:30])[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1>C(O)CC>[C:23]1([S:29]([OH:32])(=[O:31])=[O:30])[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.[Cl:1][C:2]1[CH:3]=[C:4]([N:9]2[CH2:15][C@@H:14]3[C@@H:11]([CH2:12][NH:13]3)[CH2:10]2)[CH:5]=[N:6][C:7]=1[Cl:8]

Participants

4

Reactant 2

HCID 7371Benzenesulfonic AcidHCID 23634672tert-butyl (1R,5S)-3-(5,6-dichloro-3-pyridinyl)-3,6-diazabicyclo[3.2.0]heptane-6-carboxylate

Product 1

HCID 11682800Sofinicline BenzenesulfonateYield 38.9%

Reagents, catalysts & solvents 1

HCID 10311-PropanolSolvent

Conditions

Temperature
75 °C

Procedure

Tert-butyl (1R,5S)-3-(5,6-dichloropyridin-3-yl)-3,6-diazabicyclo[3.2.0]heptane-6-carboxylate (642 mg) in 1-propanol (8 mL) was treated with benzenesulfonic acid (516 mg) and heated at 75° C. with stirring for 2 hours. The reaction mixture was cooled to room temperature, filtered, and the wetcake was dried in a vacuum oven at 50° C. to provide 292 mg of the title compound. 1H NMR (DMSO, 400 MHZ) δ 2.99 (dd, J=10, 6 Hz, 1H), 3.09 (dd, J=12, 5 Hz, 1H), 3.39 (m, 1H), 3.56 (m, 1H), 3.89 (d, J=11 Hz, 1H), 4.05–4.11 (m, 1H), 4.94 (m, 1H), 7.29 (m, 3H), 7.55 (d, J=3 Hz, 1H), 7.58 (m, 2H), 7.97 (d, J=3 Hz, 1H), 8.80 (br, 1H).

Workup

  1. temperatureThe reaction mixture was cooled to room temperature
  2. filtrationfiltered
  3. customthe wetcake was dried in a vacuum oven at 50° C.

Sources & evidence

ORD record
ord-eb0b5bce95644f8d9d2ab0b257e803b4
Source dataset
uspto-grants-2008_04
Patent number
US07351833B2

Reaction notes

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