Potassium Carbonate → 5-Amino-3,3-dimethyl-6-nitro-1-(pent-2-ynyl)-1,3-dihydro-indol-2-one

HRID 2235339Notes

Reaction equation

HRID 2235339 reaction equation
[CH3:1][C:2]1([CH3:19])[C:10]2[C:5](=[CH:6][C:7]([N+:15]([O-:17])=[O:16])=[C:8]([NH:11]C(=O)C)[CH:9]=2)[NH:4][C:3]1=[O:18].Br[CH2:21][C:22]#[C:23][CH2:24][CH3:25].C([O-])([O-])=O.[K+].[K+].C1CCN2C(=NCCC2)CC1>CO>[NH2:11][C:8]1[CH:9]=[C:10]2[C:5](=[CH:6][C:7]=1[N+:15]([O-:17])=[O:16])[N:4]([CH2:21][C:22]#[C:23][CH2:24][CH3:25])[C:3](=[O:18])[C:2]2([CH3:1])[CH3:19]

Participants

6

Reactant 4

HCID 11430Potassium CarbonateHCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 853991-Bromopent-2-yneHCID 23092658N-(3,3-Dimethyl-6-nitro-2-oxo-2,3-dihydro-1H-indol-5-yl)acetamide

Product 1

HCID 593009855-Amino-3,3-dimethyl-6-nitro-1-(pent-2-ynyl)-1,3-dihydro-indol-2-one

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

Analogously to general procedure (I) N-(3,3-dimethyl-6-nitro-2-oxo-2,3-dihydro-1H-indol-5-yl)-acetamide (4 g) is alkylated using 1-bromo-2-pentyne (3.1 ml; 30.4 mmol) and K2CO3 (4.2 g; 30.4 mmol) at 40° C. for 20 h. After aqueous work-up only a part of the crude material (1 g; 3.04 mmol) is de-acetylated under reflux using DBU (0.9 ml) in MeOH (80 ml). After aqueous work-up the crude 5-amino-3,3-dimethyl-6-nitro-1-(pent-2-ynyl)-1,3-dihydro-indol-2-one (0.87 g) is used without further purification.

Workup

  1. customat 40° C.
  2. customfor 20 h
  3. temperatureunder reflux
  4. customAfter aqueous work-up the crude 5-amino-3,3-dimethyl-6-nitro-1-(pent-2-ynyl)-1,3-dihydro-indol-2-one (0.87 g) is used without further purification

Sources & evidence

ORD record
ord-b88ed812f70640099bbb175b14ad9d75
Source dataset
uspto-grants-2010_05
Patent number
US07714010B2

Reaction notes

Loading…