Methyl iodide → 2-chloro-9-cyclopentyl-8,9-dihydro-5-methylspiro[5H-pyrimido[4,5-b][1,4]diazepine-7,1'-cyclopropan]-6(7H)-one

HRID 2111384Notes

Reaction equation

HRID 2111384 reaction equation
[Cl:1][C:2]1[N:3]=[CH:4][C:5]2[NH:13][C:12](=[O:14])[C:9]3([CH2:11][CH2:10]3)[CH2:8][N:7]([CH:15]3[CH2:19][CH2:18][CH2:17][CH2:16]3)[C:6]=2[N:20]=1.IC.[C:23](=O)([O-])[O-].[Cs+].[Cs+]>CN(C)C=O>[Cl:1][C:2]1[N:3]=[CH:4][C:5]2[N:13]([CH3:23])[C:12](=[O:14])[C:9]3([CH2:11][CH2:10]3)[CH2:8][N:7]([CH:15]3[CH2:19][CH2:18][CH2:17][CH2:16]3)[C:6]=2[N:20]=1

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 10796Cesium carbonateHCID 579698732'-chloro-9'-cyclopentyl-8',9'-dihydrospiro[cyclopropane-1,7'-pyrimido[4,5-b][1,4]diazepin]-6'(5'H)-one

Product 1

HCID 579699392-chloro-9-cyclopentyl-8,9-dihydro-5-methylspiro[5H-pyrimido[4,5-b][1,4]diazepine-7,1'-cyclopropan]-6(7H)-oneYield 91.7%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 1.00 g (0.0034 mole) of 2-chloro-9-cyclopentyl-8,9-dihydro-spiro[5H-pyrimido[4,5-b][1,4]diazepine-7,1′-cyclopropan]-6(7H)-one (VI-53) in 40 mL of dimethylformamide was added 1.47 g (0.0104 mole) of iodomethane and 1.68 g (0.00575 mole) of cesium carbonate. The mixture was stirred at ambient temperature overnight and then concentrated under reduced pressure. The residue was dissolved in ethyl acetate, washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to give 0.957 g of 2-chloro-9-cyclopentyl-8,9-dihydro-5-methylspiro[5H-pyrimido[4,5-b][1,4]diazepine-7,1′-cyclopropan]-6(7H)-one (VII-53) as a white solid.

Workup

  1. concentrationconcentrated under reduced pressure
  2. dissolutionThe residue was dissolved in ethyl acetate
  3. washwashed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-b2e92c5604e04ccda3365ae32b0138ca
Source dataset
uspto-grants-2009_04
Patent number
US07517873B2

Reaction notes

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