Potassium Carbonate → (R)-3-[N'-t-Butoxycarbonyl-N-(3'-chlorobiphenyl-4-ylmethyl)-hydrazino]-2-hydroxy-propionic Acid

HRID 2272634Notes

Reaction equation

C[O:2][C:3](=[O:24])[C@H:4]([OH:23])[CH2:5][N:6]([CH2:15][C:16]1[CH:21]=[CH:20][C:19](Br)=[CH:18][CH:17]=1)[NH:7][C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9].[Cl:25][C:26]1[CH:27]=[C:28](B(O)O)[CH:29]=[CH:30][CH:31]=1.C([O-])([O-])=O.[K+].[K+]>C1COCC1.O.[Cl-].[NH4+].[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[C:11]([O:10][C:8]([NH:7][N:6]([CH2:5][C@@H:4]([OH:23])[C:3]([OH:2])=[O:24])[CH2:15][C:16]1[CH:21]=[CH:20][C:19]([C:30]2[CH:29]=[CH:28][CH:27]=[C:26]([Cl:25])[CH:31]=2)=[CH:18][CH:17]=1)=[O:9])([CH3:14])([CH3:13])[CH3:12]

Participants

Conditions

Temperature: 90 °C

Procedure

(R)-3-[N-(4-Bromobenzyl)-N′-t-butoxycarbonyl-hydrazino]-2-hydroxy-propionic acid methyl ester (1.0 g, 2.5 mmol), 3-chlorophenylboronic acid (776 mg, 5.0 mmol), and K2CO3 (857 mg, 6.2 mmol) were dissolved in a mixture of THF (18 mL) and water (18 mL). The reaction flask was then purged with nitrogen and tetrakis(triphenylphosphine) palladium(0) (286 mg, 248 μmol) was added. The mixture was stirred at 90° C. overnight (˜18 hours). The mixture was diluted with saturated aqueous ammonium chloride and extracted with EtOAc. The organic layer was collected, dried and concentrated. The product was purified (Interchim reverse phase chromatography column, 10-80% MeCN in water) to yield the title compound.

Workup

additionwas added
extractionextracted with EtOAc
customThe organic layer was collected
customdried
concentrationconcentrated
customThe product was purified (Interchim reverse phase chromatography column, 10-80% MeCN in water)

Sources & evidence

ORD record: ord-32fc4adffb0a49a186712aa38b41bf85
Source dataset: uspto-grants-2015_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09120758B2

Reaction notes

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