Diiodomethane → 5-iodo-1-(4-methoxyphenyl)-3-methyl-1H-pyrazole-4-carbonitrile

HRID 242176Notes

Reaction equation

N[C:2]1[N:6]([C:7]2[CH:12]=[CH:11][C:10]([O:13][CH3:14])=[CH:9][CH:8]=2)[N:5]=[C:4]([CH3:15])[C:3]=1[C:16]#[N:17].[I:18]CI.N(OCCC(C)C)=O>CC#N>[I:18][C:2]1[N:6]([C:7]2[CH:12]=[CH:11][C:10]([O:13][CH3:14])=[CH:9][CH:8]=2)[N:5]=[C:4]([CH3:15])[C:3]=1[C:16]#[N:17]

Participants

Conditions

Temperature: 50 °C

Procedure

To a stirred solution of 5-amino-1-(4-methoxyphenyl)-3-methyl-1H-pyrazole-4-carbonitrile (1.30 g, 5.70 mmol) in MeCN (8 mL) was added diiodomethane (1.93 mL, 23.9 mmol) followed by isoamyl nitrite (0.19 mL, 1.42 mmol). The reaction vessel was heated using a heating gun to initiate the reaction. After the rest of isoamyl nitrite (1.72 mL, 12.8 mmol) was added and the reaction was stirred for 1 hour at 50° C. The reaction was concentrated into silica and purified using silica gel (Heptane-CH2Cl2 1:0 to 0:1) gave 5-iodo-1-(4-methoxyphenyl)-3-methyl-1H-pyrazole-4-carbonitrile (1.45 g, 75%).

Workup

temperatureThe reaction vessel was heated
customthe reaction
concentrationThe reaction was concentrated into silica
custompurified

Sources & evidence

ORD record: ord-0693e92a93294be99e50a8699e7494e5
Source dataset: uspto-grants-2014_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08653112B2

Reaction notes

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