Methyl iodide → HCID 53965613, compound

HRID 1292688Notes

Reaction equation

[CH3:1][O:2][C:3](=[O:29])[CH2:4][C:5]1[N:6]=[CH:7][N:8]([C:10]([C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)([C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[CH:9]=1.[CH3:30][Si](C)(C)[N-][Si](C)(C)C.[Li+].CI>C1COCC1>[CH3:1][O:2][C:3](=[O:29])[CH:4]([CH3:30])[C:5]1[N:6]=[CH:7][N:8]([C:10]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)([C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[C:17]2[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=2)[CH:9]=1

Participants

Conditions

Temperature: -78 °C

Procedure

A solution of 1-(triphenylmethyl)-1H-imidazol-4-ylacetic acid methyl ester (1.01 g, 2.63 mmol) in THF (25 ml) was cooled to -78° C. Lithium hexamethyldisilazide (2.76 ml of a 1M solution in THF, 2.76 mmol) was added dropwise and the reaction stirred 30 min at -78° C. Methyl iodide (0.164 ml, 2.76 mmol) was added and the reaction stirred a furthur 1 hr at -78° C. and then at -20° C. for 4 hrs. The reaction was quenched with water (10 ml) and saturated NaHCO3 solutuon (10 ml) and extracted with EtOAc. The organic extracts were dried (MgSO4) and the solvent evaporated in vacuo. Chromatography of the residue (SiO2, 2 to 3% MeOH in CH2Cl2, gradient elotion) afforded the product.

Workup

stirringthe reaction stirred a furthur 1 hr at -78° C.
waitat -20° C. for 4 hrs
customThe reaction was quenched with water (10 ml) and saturated NaHCO3 solutuon (10 ml)
extractionextracted with EtOAc
dry with materialThe organic extracts were dried (MgSO4)
customthe solvent evaporated in vacuo
customChromatography of the residue (SiO2, 2 to 3% MeOH in CH2Cl2, gradient elotion) afforded the product

Sources & evidence

ORD record: ord-385d077fb30749c687a2a722f435c888
Source dataset: uspto-grants-1998_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05756528

Reaction notes

Loading…