Ammonium Chloride → HCID 59382960, compound

HRID 1254266Notes

Reaction equation

[C:1]1([CH3:15])[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[O:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1I.[Li]CCCC.CON(C)[C:24]([C@@H:26]1[CH2:31][CH2:30][CH2:29][N:28]([C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33])[CH2:27]1)=[O:25].[NH4+].[Cl-]>C1COCC1>[C:1]1([CH3:15])[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[O:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[C:24]([C@@H:26]1[CH2:31][CH2:30][CH2:29][N:28]([C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33])[CH2:27]1)=[O:25]

Participants

Conditions

Temperature: -78 °C

Procedure

To a solution of 1-(o-tolyloxy)-2-iodobenzene (40 g, 0.13 mol) in anhydrous THF (500 mL) cooled to −78° C. was added dropwise 1.6 M n-BuLi in hexanes (52 mL, 0.13 mol). After stirring for 1 h at −78° C., a solution of (R)-tert-butyl 3-(N-methoxy-N-methylcarbamoyl)-piperidine-1-carboxylate (35 g, 0.13 mol) in anhydrous THF (500 mL) was added dropwise. The mixture was allowed to warm to rt and stirred overnight. Sat'd aq NH4Cl (500 mL) was added and the mixture was extracted with EtOAc (3×150 mL). The combined organic layers were dried over Na2SO4. Solvent removal and flash column chromatography afforded (2-(o-tolyloxy)phenyl)((R)-1-(tert-butoxycarbonyl)piperidin-3-yl)methanone (23 g, 45%).

Workup

temperatureto warm to rt
stirringstirred overnight
extractionthe mixture was extracted with EtOAc (3×150 mL)
dry with materialThe combined organic layers were dried over Na2SO4
customSolvent removal and flash column chromatography

Sources & evidence

ORD record: ord-b364bbb9ec614d96be7076717a2b11cb
Source dataset: uspto-grants-2013_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08455521B2

Reaction notes

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