Diethyl (cyanomethyl)phosphonate → 3,3-Bis(3,4,5-Trimethoxyphenyl)Acrylonitrile

HRID 2378213Notes

Reaction equation

HRID 2378213 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:13]([C:15]2[CH:20]=[C:19]([O:21][CH3:22])[C:18]([O:23][CH3:24])=[C:17]([O:25][CH3:26])[CH:16]=2)=O)[CH:6]=[C:7]([O:11][CH3:12])[C:8]=1[O:9][CH3:10].C(OP([CH2:35][C:36]#[N:37])(=O)OCC)C.C[Si]([N-][Si](C)(C)C)(C)C.[K+].O1C2C=CC(C(C3C=C(OC)C=C(OC)C=3)=CC#N)=CC=2OCC1>C1COCC1>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:13]([C:15]2[CH:20]=[C:19]([O:21][CH3:22])[C:18]([O:23][CH3:24])=[C:17]([O:25][CH3:26])[CH:16]=2)=[CH:35][C:36]#[N:37])[CH:6]=[C:7]([O:11][CH3:12])[C:8]=1[O:9][CH3:10]

Participants

6

Reactant 4

HCID 75676Diethyl (cyanomethyl)phosphonateHCID 3251421Potassium bis(trimethylsilyl)amideHCID 15273941Bis-(3,4,5-trimethoxy-phenyl)-methanoneHCID 692032153-(2,3-Dihydrobenzo[1,4]dioxin-6-yl)-3-(3,5-dimethoxyphenyl)acrylonitrile

Product 1

HCID 103179163,3-Bis(3,4,5-Trimethoxyphenyl)AcrylonitrileYield 209.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Bis-(3,4,5-trimethoxy-phenyl)-methanone (0.32 g, 0.88 mmol), cyanomethylphosphonic acid diethyl ester (0.28 ml, 0.31 mmol) in anhydrous THF (20 ml), and potassium bis(trimethylsilyl)amide (0.35 g, 1.8 mmol) were treated in the same manner as described above for the synthesis of 3-(2,3-dihydrobenzo[1,4]dioxin-6-yl)-3-(3,5-dimethoxyphenyl)acrylonitrile. The crude material was purified via flash column chromatography to give 3,3-Bis-(3,4,5-trimethoxy-phenyl)-acrylonitrile as a solid (0.25 g, 74%): mp, 146-148° C.; 1HNMR (DMSO-d6) δ 6.69 (d, J=5 Hz, 4H, Ar), 6.32 (s, 1H, CH), 3.77-3.72 (m, 18H, 6OCH3); 13C NMR (DMSO-d6) δ 161.27, 152.69, 152.61, 139.60, 138.66, 133.06, 131.94, 118.43, 107.09, 106.23, 100.40, 95.21, 60.13, 60.10, 56.08, 56.07; Anal. Calcd. For C21H24NO6: C, 65.44; H, 6.02; N, 3.63. Found: C, 65.08; H, 5.99; N, 3.45.

Workup

  1. customThe crude material was purified via flash column chromatography

Sources & evidence

ORD record
ord-09a297ba0c104925a5da1a60cf385255
Source dataset
uspto-grants-2008_12
Patent number
US07470723B2

Reaction notes

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