Cesium carbonate → (E)-4-methyl-2-(prop-1-enyl)-7-(trifluoromethyl)quinoline-3-carboxylic acid ethyl ester

HRID 2093721Notes

Reaction equation

C([O-])([O-])=O.[Cs+].[Cs+].[CH2:7]([O:9][C:10]([C:12]1[C:13](OS(C(F)(F)F)(=O)=O)=[N:14][C:15]2[C:20]([C:21]=1[CH3:22])=[CH:19][CH:18]=[C:17]([C:23]([F:26])([F:25])[F:24])[CH:16]=2)=[O:11])[CH3:8].[CH:35](/B(O)O)=[CH:36]\[CH3:37].C(O)C.C1(C)C=CC=CC=1>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.CC(=O)OCC.CCCCCC>[CH2:7]([O:9][C:10]([C:12]1[C:13](/[CH:35]=[CH:36]/[CH3:37])=[N:14][C:15]2[C:20]([C:21]=1[CH3:22])=[CH:19][CH:18]=[C:17]([C:23]([F:26])([F:25])[F:24])[CH:16]=2)=[O:11])[CH3:8]

Participants

Conditions

Temperature: 110 °C

Procedure

1.8 g (5.6 mmol) Cs2CO3 and 210 mg (0.2 mmol) Pd(PPh3)4 were added to a solution of 800 mg (1.9 mmol) 4-methyl-7-(trifluoromethyl)-2-(trifluoromethyl-sulfonyloxy)-quinoline-3-carboxylic acid ethyl ester and 320 mg (3.7 mmol) (E)-propene-1-yl-boronic acid in an ethanol/toluene mixture (1:9 vv, 20 ml) and the mixture was heated to 110° C. for 1 h. The mixture was thereafter concentrated in a vacuum and the residue was taken up with EtOAc (20 ml) and water (20 ml). The organic phase was separated, washed with water and brine, dried over Na2SO4 and concentrated in a vacuum. After CC (EA/hexane 1:9) of the residue, 450 mg (1.4 mmol, 75%) (E)-4-methyl-2-(prop-1-enyl)-7-(trifluoromethyl)quinoline-3-carboxylic acid ethyl ester was obtained.

Workup

concentrationThe mixture was thereafter concentrated in a vacuum
customThe organic phase was separated
washwashed with water and brine
dry with materialdried over Na2SO4
concentrationconcentrated in a vacuum

Sources & evidence

ORD record: ord-ee15b7fba11342268d805fee9a0e843e
Source dataset: uspto-grants-2013_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08445512B2

Reaction notes

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