Cesium carbonate → Methyl cis(+/-)-5-(4-{[(benzyloxy)carbonyl]amino}-3-methoxypiperidin-1-yl)-3-formylthiophene-2-carboxylate

HRID 1425417Notes

Reaction equation

HRID 1425417 reaction equation
Br[C:2]1[S:6][C:5]([C:7]([O:9][CH3:10])=[O:8])=[C:4]([CH:11]=[O:12])[CH:3]=1.[CH3:13][O:14][C@H:15]1[C@@H:20]([NH:21][C:22](=[O:31])[O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[CH2:19][CH2:18][NH:17][CH2:16]1.C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1.C(=O)([O-])[O-].[Cs+].[Cs+]>C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH2:24]([O:23][C:22]([NH:21][C@H:20]1[CH2:19][CH2:18][N:17]([C:2]2[S:6][C:5]([C:7]([O:9][CH3:10])=[O:8])=[C:4]([CH:11]=[O:12])[CH:3]=2)[CH2:16][C@H:15]1[O:14][CH3:13])=[O:31])[C:25]1[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=1

Participants

6

Reactant 4

HCID 10796Cesium carbonateHCID 634876Binap, (A+-)-HCID 86648490Benzyl cis(+/-)-[3-methoxypiperidin-4-yl]carbamateHCID 86648830Methyl 5-bromo-3-formylthiophene-2-carboxylate

Product 1

HCID 86648831Methyl cis(+/-)-5-(4-{[(benzyloxy)carbonyl]amino}-3-methoxypiperidin-1-yl)-3-formylthiophene-2-carboxylateYield 20.9%

Reagents, catalysts & solvents 1

HCID 167845palladium(II) acetateCatalyst

Procedure

The same operation as in Example (244b) was performed using methyl 5-bromo-3-formylthiophene-2-carboxylate obtained in Example (246b) (974 mg, 3.91 mmol), benzyl cis(±)-(3-methoxypiperidin-4-yl)-carbamate obtained in Example (40b) (1.10 g, 4.16 mmol), palladium acetate (176 mg, 0.78 mmol), BINAP (0.49 g, 0.78 mmol) and cesium carbonate (1.78 g, 5.47 mmol), to obtain 354 mg of the title compound as a yellow oily substance (21%).

Sources & evidence

ORD record
ord-8cafdaa7f4dc460786817a1dd91fc214
Source dataset
uspto-grants-2015_01
Patent number
US08927588B2

Reaction notes

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