Hydrochloric Acid → 3-Ethoxy-2-hydroxy-5-(2-oxo-5,6-diphenyl-1,2,3,4-tetrahydropyrimidin-4-yl)benzonitrile

HRID 2177924Notes

Reaction equation

HRID 2177924 reaction equation
[CH2:1]([O:3][C:4]1[C:5]([OH:14])=[C:6]([CH:9]=[C:10]([CH:12]=O)[CH:11]=1)[C:7]#[N:8])[CH3:2].[C:15]1([C:21](=O)[CH2:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.[NH2:30][C:31]([NH2:33])=[O:32].Cl>CCO.CO.CCOC(C)=O>[CH2:1]([O:3][C:4]1[C:5]([OH:14])=[C:6]([CH:9]=[C:10]([CH:12]2[C:22]([C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=3)=[C:21]([C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)[NH:33][C:31](=[O:32])[NH:30]2)[CH:11]=1)[C:7]#[N:8])[CH3:2]

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 1176UreaHCID 99482-PhenylacetophenoneHCID 866693323-Ethoxy-5-formyl-2-hydroxybenzonitrile

Product 1

HCID 513485173-Ethoxy-2-hydroxy-5-(2-oxo-5,6-diphenyl-1,2,3,4-tetrahydropyrimidin-4-yl)benzonitrileYield 45.7%

Reagents, catalysts & solvents 3

HCID 702EthanolSolventHCID 887MethanolSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 3-ethoxy-5-formyl-2-hydroxybenzonitrile (285 mg, 1.5 mmol), 1,2-diphenylethanone (320 mg, 1.6 mmol), and urea (270 mg, 4.5 mmol) in anhydrous EtOH (5 mL) was added concentrated HCl solution (0.5 mL). The reaction mixture was refluxed overnight. TLC (EtOAc:MeOH=10:1) showed 40% of the starting materials were consumed. The reaction mixture was concentrated, and purified by column chromatography (EtOAc:MeOH=40:1) and preparative HPLC to afford Compound 69 as a yellow solid (280 mg, yield: 45.7%). 1H NMR (DMSO-d6 400 MHz TMS): δ 10.30 (s, 1H), 8.70 (d, J=1.2 Hz, 1H), 7.47 (s, 1H), 7.20-7.27 (m, 5H), 7.16 (d, J=1.6 Hz, 1H), 6.98-7.06 (m, 4H), 6.80-6.82 (m, 2H), 5.14 (d, J=2.4 Hz, 1H), 4.00-4.10 (m, 2H), 1.33 (t, J=7.2 Hz, 3H); MS (ESI): m/z 412.1 [M+1]+.

Workup

  1. temperatureThe reaction mixture was refluxed overnight
  2. customwere consumed
  3. concentrationThe reaction mixture was concentrated
  4. custompurified by column chromatography (EtOAc:MeOH=40:1) and preparative HPLC

Sources & evidence

ORD record
ord-00791a6832124d9badba2ac11c665637
Source dataset
uspto-grants-2015_06
Patent number
US09067893B2

Reaction notes

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