[3-Cyano-4,5-dimethyl-5-(trifluoromethyl)furan-2(5H)-ylidene]malononitrile → 2-[4-[4-(4-dibutylamino-2-methoxyphenyl)-1,3-butadienyl]-3-cyano-5-methyl-5-trifluoromethyl-2(5H)-furanylidene]propanedinitrile

HRID 85279Notes

Reaction equation

[CH2:1]([N:5]([CH2:18][CH2:19][CH2:20][CH3:21])[C:6]1[CH:11]=[CH:10][C:9]([CH:12]=[CH:13][CH:14]=O)=[C:8]([O:16][CH3:17])[CH:7]=1)[CH2:2][CH2:3][CH3:4].[C:22]([C:24]1[C:25](=[C:35]([C:38]#[N:39])[C:36]#[N:37])[O:26][C:27]([CH3:34])([C:30]([F:33])([F:32])[F:31])[C:28]=1[CH3:29])#[N:23]>C(O)C>[CH2:1]([N:5]([CH2:18][CH2:19][CH2:20][CH3:21])[C:6]1[CH:11]=[CH:10][C:9]([CH:12]=[CH:13][CH:14]=[CH:29][C:28]2[C:27]([CH3:34])([C:30]([F:33])([F:31])[F:32])[O:26][C:25](=[C:35]([C:38]#[N:39])[C:36]#[N:37])[C:24]=2[C:22]#[N:23])=[C:8]([O:16][CH3:17])[CH:7]=1)[CH2:2][CH2:3][CH3:4]

Participants

Conditions

Temperature: 50 °C

Procedure

In 5 ml of ethanol were dissolved 145 mg (0.50 mmol) of 3-(4-dibutylamino-2-methoxyphenyl)propenal and 140 mg (0.55 mmol) of 2-(3-cyano-4,5-dimethyl-5-trifluoromethyl-2(5H)-furanylidene)propanedinitrile. After the mixture was stirred with heating at 50° C. for 2 hours, the solvent was evaporated off. The residue was purified by silica gel column chromatography to give 242 mg of a dark greenish brown crystal (yield: 92.1%; mp: 169-170° C.).

Workup

customthe solvent was evaporated off
customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record: ord-06a1f2c3046f4056ad4bce8b1277ab68
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08846955B2

Reaction notes

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