Water → 1,1-Dimethylethyl 4-(4-fluorophenyl)-3,6-dihydro-1(2H)-pyridinecarboxylate

HRID 509270Notes

Reaction equation

CC1(C)C(C)(C)OB([C:9]2[CH2:14][CH2:13][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:11][CH:10]=2)O1.Br[C:24]1[CH:29]=[CH:28][C:27]([F:30])=[CH:26][CH:25]=1.C([O-])([O-])=O.[K+].[K+].O>C1(C)C=CC=CC=1.CCO.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[F:30][C:27]1[CH:28]=[CH:29][C:24]([C:9]2[CH2:14][CH2:13][N:12]([C:15]([O:17][C:18]([CH3:19])([CH3:20])[CH3:21])=[O:16])[CH2:11][CH:10]=2)=[CH:25][CH:26]=1

Participants

Conditions

Temperature: 100 °C

Procedure

Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate (120 mg, 0.388 mmol) was dissolved in toluene/EtOH (3 ml/0.15 ml), and then 1-bromo-4-fluorobenzene (0.05 ml, 0.466 mmol), Pd(PPh3)4 (22 mg, 0.02 mmol), and K2CO3 (107 mg, 0.776 mmol) were sequentially added thereto. The resulting mixture was stirred at 100° C. under nitrogen stream for 2 hours. Distilled water (3 ml) was added to the resulting reaction liquid, followed by extraction with MC (10 ml×3). The organic layer was dried over anhydrous magnesium sulfate, followed by filtration and concentration, and then the residue thus obtained was subjected to MPLC (6% EtOAc/Hexanes), to obtain 48 mg of colorless oil (45%).

Workup

extractionfollowed by extraction with MC (10 ml×3)
dry with materialThe organic layer was dried over anhydrous magnesium sulfate
filtrationfollowed by filtration and concentration
customthe residue thus obtained

Sources & evidence

ORD record: ord-71599e62507040a4a5e44a16d2b065fa
Source dataset: uspto-grants-2015_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09096571B2

Reaction notes

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