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molecular formula C16H24N2O B1195838 Ropinirole CAS No. 91374-21-9

Ropinirole

Cat. No. B1195838
M. Wt: 260.37 g/mol
InChI Key: UHSKFQJFRQCDBE-UHFFFAOYSA-N
Attention: For research use only. Not for human or veterinary use.
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Patent
US04997954

Procedure details

Under an atmosphere of nitrogen, a suspension of 4-(2'-bromoethyl)-1,3-dihydro-2H-indol-2-one (245 mg, 102 mmol) was prepared by the addition of di-n-propylamine (1.00 g, 10 mmol, 1.35 ml) which has previously been degassed with a stream of nitrogen. After stirring for 30 minutes, degassed acetonitrile (5 ml) was added to give a pale yellow solution. After an additional hour the solution was heated, and maintained at reflux for 5 hours. After cooling to ambient temperature, the solution was poured into IN hydrochloric acid (35 ml) and extracted with ether (50 ml). The aqueous layer was made neutral to pH 7-7.5 with solid sodium bicarbonate and extracted with dichloromethane (50 ml). After drying separately, the ether layer was evaporated to give 4-vinyl-indol-2-one (60 mg, 37.7%) Evaporation of the dichloromethane layer gave 4-[2-(dipropylamino)ethyl]-1.3-dihydro-2H-indol-2-one (155 mg. 58.5%) as free-base which was then taken up in absolute ethanol (5 ml) and saturated with gaseous hydrogen chloride. The solvent was removed in vaccuo to give the crude hydrochloride salt (170 mg) as a light yellow solid. Recrystallisation from absolute ethanol (2 ml) gave light yellow crystals (110 mg 63% from the free-base) of 4-[2-(dipropylamino)ethyl]-1,3- dihydro-2H-indol-2-one hydrochloride m.p. 242-244° C.
Quantity
245 mg
Type
reactant
Reaction Step One
Quantity
1.35 mL
Type
reactant
Reaction Step Two
Quantity
35 mL
Type
solvent
Reaction Step Three

Identifiers

REACTION_CXSMILES
Br[CH2:2][CH2:3][C:4]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:5]=1[CH2:6][C:7](=[O:13])[NH:8]2.[CH2:14]([NH:17][CH2:18][CH2:19][CH3:20])[CH2:15][CH3:16]>Cl>[CH2:14]([N:17]([CH2:18][CH2:19][CH3:20])[CH2:2][CH2:3][C:4]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:5]=1[CH2:6][C:7](=[O:13])[NH:8]2)[CH2:15][CH3:16]

Inputs

Step One
Name
Quantity
245 mg
Type
reactant
Smiles
BrCCC1=C2CC(NC2=CC=C1)=O
Step Two
Name
Quantity
1.35 mL
Type
reactant
Smiles
C(CC)NCCC
Step Three
Name
Quantity
35 mL
Type
solvent
Smiles
Cl

Conditions

Temperature
Control Type
AMBIENT
Stirring
Type
CUSTOM
Details
After stirring for 30 minutes
Rate
UNSPECIFIED
RPM
0
Other
Conditions are dynamic
1
Details
See reaction.notes.procedure_details.

Workups

CUSTOM
Type
CUSTOM
Details
has previously been degassed with a stream of nitrogen
CUSTOM
Type
CUSTOM
Details
degassed acetonitrile (5 ml)
ADDITION
Type
ADDITION
Details
was added
CUSTOM
Type
CUSTOM
Details
to give a pale yellow solution
TEMPERATURE
Type
TEMPERATURE
Details
After an additional hour the solution was heated
TEMPERATURE
Type
TEMPERATURE
Details
maintained
TEMPERATURE
Type
TEMPERATURE
Details
at reflux for 5 hours
Duration
5 h
EXTRACTION
Type
EXTRACTION
Details
extracted with ether (50 ml)
EXTRACTION
Type
EXTRACTION
Details
extracted with dichloromethane (50 ml)
CUSTOM
Type
CUSTOM
Details
After drying separately
CUSTOM
Type
CUSTOM
Details
the ether layer was evaporated
CUSTOM
Type
CUSTOM
Details
to give
CUSTOM
Type
CUSTOM
Details
4-vinyl-indol-2-one (60 mg, 37.7%) Evaporation of the dichloromethane layer

Outcomes

Product
Details
Reaction Time
30 min
Name
Type
product
Smiles
C(CC)N(CCC1=C2CC(NC2=CC=C1)=O)CCC
Measurements
Type Value Analysis
AMOUNT: MASS 155 mg
YIELD: PERCENTYIELD 58.5%
YIELD: CALCULATEDPERCENTYIELD 6%

Source

Source
Open Reaction Database (ORD)
Description
The Open Reaction Database (ORD) is an open-access schema and infrastructure for structuring and sharing organic reaction data, including a centralized data repository. The ORD schema supports conventional and emerging technologies, from benchtop reactions to automated high-throughput experiments and flow chemistry. Our vision is that a consistent data representation and infrastructure to support data sharing will enable downstream applications that will greatly improve the state of the art with respect to computer-aided synthesis planning, reaction prediction, and other predictive chemistry tasks.
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