Potassium Carbonate → tert-Butyl 4-(2-(1-(5-cyclopropylpyrimidin-2-yl)piperidin-4-yl)-2-methyl-2,3-dihydrobenzofuran-5-yl)-5,6-dihydropyridine-1(2H)-carboxylate

HRID 1025512Notes

Reaction equation

HRID 1025512 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]([CH:11]3[CH2:16][CH2:15][N:14]([C:17]4[N:22]=[CH:21][C:20]([CH:23]5[CH2:25][CH2:24]5)=[CH:19][N:18]=4)[CH2:13][CH2:12]3)([CH3:10])[CH2:7][C:6]=2[CH:26]=1.CC1(C)C(C)(C)OB([C:35]2[CH2:40][CH2:39][N:38]([C:41]([O:43][C:44]([CH3:47])([CH3:46])[CH3:45])=[O:42])[CH2:37][CH:36]=2)O1.C([O-])([O-])=O.[K+].[K+]>O1CCOCC1.O.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>[CH:23]1([C:20]2[CH:19]=[N:18][C:17]([N:14]3[CH2:15][CH2:16][CH:11]([C:8]4([CH3:10])[CH2:7][C:6]5[CH:26]=[C:2]([C:35]6[CH2:40][CH2:39][N:38]([C:41]([O:43][C:44]([CH3:47])([CH3:46])[CH3:45])=[O:42])[CH2:37][CH:36]=6)[CH:3]=[CH:4][C:5]=5[O:9]4)[CH2:12][CH2:13]3)=[N:22][CH:21]=2)[CH2:25][CH2:24]1

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 674689412-(4-(5-Bromo-2-methyl-2,3-dihydrobenzofuran-2-yl)piperidin-1-yl)-5-cyclopropylpyrimidine

Product 1

HCID 68211506tert-Butyl 4-(2-(1-(5-cyclopropylpyrimidin-2-yl)piperidin-4-yl)-2-methyl-2,3-dihydrobenzofuran-5-yl)-5,6-dihydropyridine-1(2H)-carboxylateYield 68.3%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

To a degassed solution of 2-(4-(5-bromo-2-methyl-2,3-dihydrobenzofuran-2-yl)piperidin-1-yl)-5-cyclopropylpyrimidine (424 mg, 1.02 mmol), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate (380 mg, 1.23 mmol), and K2CO3 (424 mg, 3.07 mmol) in dioxane (6 mL) and water (2 mL) was added Pd(Ph3P)4 (59.1 mg, 0.051 mmol). Upon completion of addition, the reaction mixture was heated in 100° C. oil bath for 3 hours. After this time, the reaction mixture was cooled to room temperature, diluted with water, and extracted with CH2Cl2 (3×5 mL). The combined organic layers were dried (Na2SO4), filtered, and concentrated to yield a residue. The residue was purified by column chromatography (silica gel, hexanes/EtOAc gradient 0 to 50% EtOAc) to afford Compound 11F as a white solid (360 mg, 0.697 mmol, 68% yield). 1H NMR (500 MHz, CDCl3) δ ppm 8.11 (s, 2 H), 7.15 (s, 1 H), 7.13 (d, J=8.5 Hz, 1 H), 6.65-6.71 (m, 1 H), 5.88 (br. s., 1 H), 4.75-4.87 (m, 2 H), 4.05 (br. s., 2 H), 3.73 (t, J=6.2 Hz, 1 H), 3.62 (t, J=5.5 Hz, 2 H), 3.16 (d, J=15.7 Hz, 1 H), 2.74-2.87 (m, 2 H), 2.39-2.54 (m, 2 H), 1.86-1.96 (m, 2 H), 1.76-1.84 (m, 1 H), 1.67-1.74 (m, 1 H), 1.61 (m, 1 H), 1.49 (s, 9 H), 1.37-1.41 (m, 3 H), 1.23-1.36 (m, 1 H), 0.84-0.92 (m, 2 H), 0.54-0.60 (m, 2 H). LC/MS (m/z)=517 (M+H)+.

Workup

  1. additionUpon completion of addition
  2. temperatureAfter this time, the reaction mixture was cooled to room temperature
  3. extractionextracted with CH2Cl2 (3×5 mL)
  4. dry with materialThe combined organic layers were dried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customto yield a residue
  8. customThe residue was purified by column chromatography (silica gel, hexanes/EtOAc gradient 0 to 50% EtOAc)

Sources & evidence

ORD record
ord-3a1f12e0bbd94774963acd83fe6af1b3
Source dataset
uspto-grants-2014_05
Patent number
US08729084B2

Reaction notes

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