Methyl iodide → (2R,4R)-4-Methoxy-1-trityl-pyrrolidine-2-carboxylic acid methyl ester

HRID 1796284Notes

Reaction equation

[CH3:1][O:2][C:3]([C@H:5]1[CH2:9][C@@H:8]([OH:10])[CH2:7][N:6]1[C:11]([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)([C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)=[O:4].CI.[H-].[Na+].[CH3:34]COC(C)=O>CN(C=O)C.C1COCC1>[CH3:1][O:2][C:3]([C@H:5]1[CH2:9][C@@H:8]([O:10][CH3:34])[CH2:7][N:6]1[C:11]([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)[C:18]1[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=1)=[O:4]

Participants

Conditions

Temperature: 0 °C

Procedure

Into a solution of 2 (5.71 g, 14.7 mmol) in anhydrous DMF (20 mL) and anhydrous THF (20 mL) was added MeI (3.67 mL, 58.9 mmol). The solution was cooled to 0° C. in an ice bath and NaH (0.766 g, 19.2 mmol) was added in one portion. The mixture was stirred at RT for 26 h before adding EtOAc and washing sequentially with water and brine. The organic layer was dried over MgSO4 and concentrated under reduced pressure. Purification of the crude material by flash chromatography revealed 3 (4.67 g, 79%) as a white solid.

Workup

washwashing sequentially with water and brine
dry with materialThe organic layer was dried over MgSO4
concentrationconcentrated under reduced pressure
customPurification of the crude material by flash chromatography

Sources & evidence

ORD record: ord-feace65f19904048935cc423bb3f9dfd
Source dataset: uspto-grants-2006_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07030141B2

Reaction notes

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