Dimethylformamide → 1-ethyl-3,3,5-trimethyl-2,4-dioxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepine-7-carbonitrile

HRID 1504114Notes

Reaction equation

[CH2:1]([N:3]1[C:9](=[O:10])[C:8]([CH3:12])([CH3:11])[C:7](=[O:13])[N:6]([CH3:14])[C:5]2[CH:15]=[C:16](OS(C(F)(F)F)(=O)=O)[CH:17]=[CH:18][C:4]1=2)[CH3:2].[CH3:27][N:28](C=O)C>[C-]#N.[Zn+2].[C-]#N.[Pd].[Pd].C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C1(P(C2C=CC=CC=2)[C-]2C=CC=C2)C=CC=CC=1.[C-]1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=C1.[Fe+2].[Zn]>[CH2:1]([N:3]1[C:9](=[O:10])[C:8]([CH3:12])([CH3:11])[C:7](=[O:13])[N:6]([CH3:14])[C:5]2[CH:15]=[C:16]([C:27]#[N:28])[CH:17]=[CH:18][C:4]1=2)[CH3:2]

Participants

Conditions

Temperature: 170 °C

Procedure

Trifluoromethanesulfonic acid 1-ethyl-3,3,5-trimethyl-2,4-dioxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepine-7-yl ester(0.12 g), zinc cyanide(70 mg), tris(dibenzylideneacetone) dipalladium 7 mg), 1,1′-bis(diphenylphosphino) ferrocene(8 mg), and zinc powder(2 mg) were added to DMF (1 ml), and the mixture was heated for 20 minutes at 170° C. (microwave reactor). The reaction liquid was cooled to room temperature, and subjected to celite filtration. The filtrate was condensed under reduced pressure, and the residue was purified by silica gel column chromatography (hexane: ethyl acetate=50:50→0:100). The purified product was condensed under reduced pressure to give the title compound(77 mg) as a white solid.

Workup

customThe reaction liquid
temperaturewas cooled to room temperature
filtrationsubjected to celite filtration
customcondensed under reduced pressure
customthe residue was purified by silica gel column chromatography (hexane: ethyl acetate=50:50→0:100)
customcondensed under reduced pressure

Sources & evidence

ORD record: ord-a0dd4503c302459c83027fdc64e11a03
Source dataset: uspto-grants-2015_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09212187B2

Reaction notes

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