Iodoethane → 2-(2,5-Dimethyl-pyrrol-1-yl)-6-propyl-pyridine

HRID 2358531Notes

Reaction equation

[CH3:1][C:2]1[N:3]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([CH3:14])[N:9]=2)[C:4]([CH3:7])=[CH:5][CH:6]=1.[Li+].[CH3:16][CH:17]([N-]C(C)C)C.C(I)C>C1COCC1>[CH3:7][C:4]1[N:3]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([CH2:14][CH2:16][CH3:17])[N:9]=2)[C:2]([CH3:1])=[CH:6][CH:5]=1

Participants

Conditions

Temperature: -30 °C

Procedure

A solution of the product from Example 2a (7.53 g, 40.0 mmol) in 30 mL of dry THF was added dropwise with stirring to a solution of LDA (42.4 mmol) in 30 mL of dry THF at −30° C. Stirred at −30° C. for 30 min. Added EtI (3.42 mL, 42.0 mmol) in 20 mL of dry THF dropwise with stirring for 30 min then warmed to room temperature. After 2 h quenched by pouring into saturated NaCl solution and extracted with ether. Dried over MgSO4, filtered and concentrated under vacuum giving the title compound. The product was purified by silica gel column chromatography eluting with EtOAc/hexane to give the title compound (5.21 g, 60%).

Workup

temperaturethen warmed to room temperature
customAfter 2 h quenched
additionby pouring into saturated NaCl solution
extractionextracted with ether
dry with materialDried over MgSO4
filtrationfiltered
concentrationconcentrated under vacuum

Sources & evidence

ORD record: ord-b8abbd1f918c4f128cd0f1c036af5723
Source dataset: uspto-grants-2010_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07763731B2

Reaction notes

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