Ammonium Acetate → (3R)-1-[7-(1-aminoethyl)-5-chloroquinolin-8-yl]pyrrolidin-3-ol

HRID 1192499Notes

Reaction equation

[Cl:1][C:2]1[CH:11]=[C:10]([C:12](=O)[CH3:13])[C:9]([N:15]2[CH2:19][CH2:18][C@@H:17]([OH:20])[CH2:16]2)=[C:8]2[C:3]=1[CH:4]=[CH:5][CH:6]=[N:7]2.C([O-])(=O)C.[NH4+].C([BH3-])#[N:27].[Na+]>CO.C(#N)C>[NH2:27][CH:12]([C:10]1[C:9]([N:15]2[CH2:19][CH2:18][C@@H:17]([OH:20])[CH2:16]2)=[C:8]2[C:3]([CH:4]=[CH:5][CH:6]=[N:7]2)=[C:2]([Cl:1])[CH:11]=1)[CH3:13]

Participants

Conditions

Temperature: 65 °C

Procedure

A mixture of 1-{5-chloro-8-[(3R)-3-hydroxypyrrolidin-1-yl]quinolin-7-yl}ethanone (95 mg, 0.33 mmol) and ammonium acetate (252 mg, 3.27 mmol) in methanol (1.8 mL) and acetonitrile (1.9 mL) was heated at 65° C. in a sealed tube for 30 minutes. After cooling, sodium cyanoborohydride (41.1 mg, 0.653 mmol) was added to the resultant mixture. The reaction was heated at 65° C. for another 4 hours, then cooled to room temperature and quenched with saturated sodium bicarbonate. The mixture was then extracted with dichloromethane. The combined extracts were dried over magnesium sulfate and evaporated to dryness (58 mg, 60%). The residue was used directly in the next step. LCMS calculated for C15H19ClN3O(M+H)+: m/z=292.1; found: 292.1.

Workup

temperatureAfter cooling
temperatureThe reaction was heated at 65° C. for another 4 hours
temperaturecooled to room temperature
customquenched with saturated sodium bicarbonate
extractionThe mixture was then extracted with dichloromethane
dry with materialThe combined extracts were dried over magnesium sulfate
customevaporated to dryness (58 mg, 60%)

Sources & evidence

ORD record: ord-67f35ca2da4b4dae9a8e754e8528c486
Source dataset: uspto-grants-2014_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08680108B2

Reaction notes

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