Methyl iodide → 2-Chloro-9-cyclopentyl-5-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one

HRID 1437107Notes

Reaction equation

[Cl:1][C:2]1[N:3]=[CH:4][C:5]2[NH:11][C:10](=[O:12])[CH2:9][CH2:8][N:7]([CH:13]3[CH2:17][CH2:16][CH2:15][CH2:14]3)[C:6]=2[N:18]=1.[CH3:19]I.[H-].[Na+]>CC(N(C)C)=O>[Cl:1][C:2]1[N:3]=[CH:4][C:5]2[N:11]([CH3:19])[C:10](=[O:12])[CH2:9][CH2:8][N:7]([CH:13]3[CH2:17][CH2:16][CH2:15][CH2:14]3)[C:6]=2[N:18]=1

Participants

Conditions

Temperature: 0 °C

Procedure

2-Chloro-9-cyclopentyl-8,9-dihydro-5H-pyrimido[4.5-b][1,4]diazepin-6(7H)-one (474.7 mg, 1.78 mmol) and methyl iodide (0.122 ml, 1.96 mmol) in DMA (4.5 ml) stirred at −10° C. and treated with sodium hydride 60% oil dispersion (75 mg, 1.87 mmol). The mixture was warmed to 0° C. for 20 min and then to 20° C. for 40 min. A further 0.12 ml methyl iodide and 8 mg sodium hydride were added and the mixture stirred at ambient overnight. Ice was added and the mixture concentrated under reduced pressure. The residual oil was treated dropwise with water (6 ml), filtered and the buff solid dried under high vacuum at 60° C. (486 mg, 98%). NMR DMSO D6 1.45-1.72 (6H, m), 1.76-1.91 (2H, m), 2.61 (2H, d), 3.18 (3H, s), 3.64 (2H, d), 4.65-4.74 (1H, m), 8.15 (1H, s).

Workup

additionIce was added
concentrationthe mixture concentrated under reduced pressure
additionThe residual oil was treated dropwise with water (6 ml)
filtrationfiltered
customthe buff solid dried under high vacuum at 60° C. (486 mg, 98%)

Sources & evidence

ORD record: ord-030e8e5c50c040519054aeae4849ba23
Source dataset: uspto-grants-2009_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07622463B2

Reaction notes

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