Methyl iodide → HCID 22629553, compound

HRID 912799Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C:11]([OH:20])([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].[CH3:23]I>CN(C=O)C.CCOC(C)=O>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][C:11]([O:20][CH3:23])([C:14]2[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=2)[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of the ester from step (a) above (4.3 g, 15.5 mol) in DMF (30 mL) was added NaH (60% in mineral oil, 0.93 g, 23.2 mmol) and the mixture was stirred at 0° C. for 1 h. MeI (1.16 mL, 18.6 mmol, Aldrich) was added drop-wise with stirring at 0° C., and the mixture was stirred at room temperature for 18 h. The reaction mixture was diluted with EtOAc (50 mL), washed with saturated solution of NH4Cl (25 mL) and brine (25 mL), dried over Na2SO4 and filtered. The solvent was removed in vacuo and the residue purified by silica gel chromatography, eluting with 10% EtOAc/hexane, to give the title compound as a light-yellow oil, which was used in the next step without additional purification. MS (ESI, pos. ion) m/z: 292 (M+1).

Workup

stirringwith stirring at 0° C.
stirringthe mixture was stirred at room temperature for 18 h
washwashed with saturated solution of NH4Cl (25 mL) and brine (25 mL)
dry with materialdried over Na2SO4
filtrationfiltered
customThe solvent was removed in vacuo
customthe residue purified by silica gel chromatography
washeluting with 10% EtOAc/hexane

Sources & evidence

ORD record: ord-c4ad3aba6a2f4ba8a0e752aa32e14cef
Source dataset: uspto-grants-2011_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08026241B2

Reaction notes

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