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Triethylamine → (E)-3-(1-ethyl 3,3,5-trimethyl 2,4-dioxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-7-yl) acrylic acid ethyl ester

HRID 1504117
Notes
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Reaction equation

HRID 1504117 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].[C:27]([O:31][CH2:32][CH3:33])(=[O:30])[CH:28]=[CH2:29].[Cl-].[Li+].C(N(CC)CC)C>CN(C=O)C>[CH2:32]([O:31][C:27](=[O:30])/[CH:28]=[CH:29]/[C:16]1[CH:17]=[CH:18][C:4]2[N:3]([CH2:1][CH3:2])[C:9](=[O:10])[C:8]([CH3:11])([CH3:12])[C:7](=[O:13])[N:6]([CH3:14])[C:5]=2[CH:15]=1)[CH3:33]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 8821Ethyl AcrylateHCID 433294Lithium ChlorideHCID 86670475Trifluoromethanesulfonic acid 1-ethyl-3,3,5-trimethyl-2,4-dioxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepine-7-yl ester

Product 1

HCID 66960494(E)-3-(1-ethyl 3,3,5-trimethyl 2,4-dioxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-7-yl) acrylic acid ethyl ester
Yield 103.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
180 °C

Procedure

Trifluoromethane sulfonic acid 1-ethyl-3,3,5-trimethyl-2,4-dioxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-7-yl ester(0.40 g), ethyl acrylate(0.13 g), dichlorobis(triphenylphosphine) Palladium (II) (35 mg),lithium chloride(64 mg), and triethylamine(0.19 ml) were added to DMF(4 ml). The mixture was heated at 180° C. (microwave reactor) for 20 minutes. 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=70:30→30:70). The purified product was condensed under reduced pressure to give the title compound(0.36 g) as a pale yellow solid.

Workup

  1. customThe reaction liquid
  2. temperaturewas cooled to room temperature
  3. filtrationsubjected to celite filtration
  4. customcondensed under reduced pressure
  5. customthe residue was purified by silica gel column chromatography (hexane: ethyl acetate=70:30→30:70)
  6. customcondensed under reduced pressure

Sources & evidence

ORD record
ord-5afa633bd1704e76aead6aed226fb2cb
Source dataset
uspto-grants-2015_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09212187B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes