Cesium carbonate → HCID 23034279, compound

HRID 916897Notes

Reaction equation

[C:1]([O:5][C:6]([NH:8][CH:9]([C:15]1[CH:20]=[CH:19][C:18](OS(C2C(C)=CC=CC=2)(=O)=O)=[CH:17][CH:16]=1)[CH2:10][C:11]([O:13][CH3:14])=[O:12])=[O:7])([CH3:4])([CH3:3])[CH3:2].C(=O)([O-])[O-].[Cs+].[Cs+].C1(P(C2CCCCC2)C2CCCCC2)CCCCC1.[CH3:57][O:58][C:59]1[CH:64]=[CH:63][CH:62]=[C:61]([O:65][CH3:66])[C:60]=1B(O)O>O1CCOCC1.C1CC=CCCC=C1.C1CC=CCCC=C1.[Ni]>[C:1]([O:5][C:6]([NH:8][CH:9]([C:15]1[CH:16]=[CH:17][C:18]([C:60]2[C:59]([O:58][CH3:57])=[CH:64][CH:63]=[CH:62][C:61]=2[O:65][CH3:66])=[CH:19][CH:20]=1)[CH2:10][C:11]([O:13][CH3:14])=[O:12])=[O:7])([CH3:2])([CH3:3])[CH3:4]

Participants

Conditions

Temperature: 50 °C

Procedure

Under a nitrogen atmosphere, methyl N-(t-butyloxycarbonyl)-3-amino-3-(4-toluenesulfonyloxyphenyl)propionate (0.45 g, 1.0 mmol), cesium carbonate (0.65 g, 2.0 mmol), tricyclohexylphosphine (0.059 g, 0.2 mmol), bis(1,5-cyclooctadiene)nickel (0.028 g, 0.1 mmol) and 2,6-dimethoxyphenylboronic acid (0.36 g, 2.0 mmol) were mixed in dioxane (1 ml). The reaction mixture was heated to 50° C. and then stirred at the same temperature for 2 hrs. After the reaction was completed, the mixture was left to cool to room temperature and insoluble substances were filtered off. The filtrate was subjected to column chromatography purification to obtain methyl N-(t-butyloxycarbonyl)-3-amino-3-[4-(2,6-dimethoxyphenyl)phenyl]propionate (0.34 g, yield 83%) as colorless oil.

Workup

waitthe mixture was left
temperatureto cool to room temperature
filtrationinsoluble substances were filtered off
customThe filtrate was subjected to column chromatography purification

Sources & evidence

ORD record: ord-c8f88e249c4d48bc9c12d88afd738d10
Source dataset: uspto-grants-2007_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07271280B2

Reaction notes

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