Tetrahydrofuran → HCID 11580988, compound

HRID 2250529Notes

Reaction equation

Br[C:2]1[CH:3]=[C:4]2[C:8](=[C:9]([F:11])[CH:10]=1)[NH:7][C:6](=[O:12])[C:5]2([CH3:14])[CH3:13].[C:15]([O:19][C:20]([N:22]1[CH:26]=[CH:25][CH:24]=[C:23]1B(O)O)=[O:21])([CH3:18])([CH3:17])[CH3:16].[F-].[K+].C1COCC1>CCOC(C)=O.P(C(C)(C)C)(C(C)(C)C)C(C)(C)C>[F:11][C:9]1[CH:10]=[C:2]([C:23]2[N:22]([C:20]([O:19][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:21])[CH:26]=[CH:25][CH:24]=2)[CH:3]=[C:4]2[C:8]=1[NH:7][C:6](=[O:12])[C:5]2([CH3:14])[CH3:13]

Participants

Conditions

Temperature: 25 °C

Procedure

A vial was charged with 5-bromo-7-fluoro-3,3-dimethyl-1,3-dihydro-2H-indol-2-one (1.0 g, 3.5 mmol), 1-tert-butoxycarbonyl-2-pyrroleboronic acid (1.12 g, 5.3 mmol), KF (0.67 g, 11.5 mmol), and Pd2(dba)3 monochloroform adduct (54 mg, 0.053 mmol) and placed under a nitrogen atmosphere. THF (8 mL) was added and the mixture was purged with nitrogen for 5 min. P(t-Bu)3 (10% wt. solution in hexane 0.370 mL, 0.126 mmol) was added via syringe and the mixture was stirred at 25° C. for 16 h. The mixture was diluted with EtOAc and filtered through a plug of silica gel and concentrated. Purification by flash chromatography (500 mL 25% hexane/CH2Cl2 then 500 mL 100% CH2Cl2 then 500 mL 5% ethyl acetate/CH2Cl2) afforded the title compound (1.06 g, 88%) as colorless crystals.

Workup

customthe mixture was purged with nitrogen for 5 min
filtrationfiltered through a plug of silica gel
concentrationconcentrated
customPurification by flash chromatography (500 mL 25% hexane/CH2Cl2

Sources & evidence

ORD record: ord-d45b1fcb827b40918d1524a5716d1eb6
Source dataset: uspto-grants-2008_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07317037B2

Reaction notes

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