Diisopropylethylamine → 10-(1-Tert-butylpiperidin-4-ylthio)-2-(pyridin-2-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine

HRID 1530550Notes

Reaction equation

HRID 1530550 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]2[O:14][CH2:13][CH2:12][N:11]3[C:7](=[N:8][C:9]([C:15]4[CH:20]=[CH:19][CH:18]=[CH:17][N:16]=4)=[CH:10]3)[C:6]=2[CH:21]=1.[C:22]([N:26]1[CH2:31][CH2:30][CH:29]([SH:32])[CH2:28][CH2:27]1)([CH3:25])([CH3:24])[CH3:23].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2.CCN(C(C)C)C(C)C>O1CCOCC1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[C:22]([N:26]1[CH2:31][CH2:30][CH:29]([S:32][C:2]2[CH:3]=[CH:4][C:5]3[O:14][CH2:13][CH2:12][N:11]4[CH:10]=[C:9]([C:15]5[CH:20]=[CH:19][CH:18]=[CH:17][N:16]=5)[N:8]=[C:7]4[C:6]=3[CH:21]=2)[CH2:28][CH2:27]1)([CH3:25])([CH3:23])[CH3:24]

Participants

7

Reactant 4

HCID 81531DiisopropylethylamineHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 683127009-Bromo-2-pyridin-2-yl-4,5-dihydro-6-oxa-1,3a-diazabenzo[e]azuleneHCID 866714621-tert-Butylpiperidine-4-thiol

Product 1

HCID 6831306710-(1-Tert-butylpiperidin-4-ylthio)-2-(pyridin-2-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
140 °C

Procedure

A mixture of 9-bromo-2-pyridin-2-yl-4,5-dihydro-6-oxa-1,3a-diazabenzo[e]azulene from Example 3 (200 mg, 0.58 mmol), 1-tert-butylpiperidine-4-thiol (202 mg, 1.69 mmol), Pd2(dba)3 (160 mg, 10 mol %), XantPhos (68 mg, 20 mol %) and DIPEA (410 μL, 2.34 mmol) in dioxane (5 mL) was purged with argon and heated at 140° C. for 1 h using microwave irradiation. The reaction mixture was filtered through Celite® and the filtrate concentrated in vacuo. The resulting residue was loaded onto an Isolute® SCX-2 cartridge which was washed with MeOH and the product eluted with 2M NH3/MeOH. The resulting residue was purified by column chromatography (Si-PCC, gradient 0-20% MeOH in DCM then C18, gradient 2-25% MeOH in H2O). The resulting residue was loaded onto an Isolute® SCX-2 cartridge which was washed with MeOH and the product eluted with 2M NH3/MeOH affording 154 as a white solid (36 mg, 15%). LCMS: RT 2.40 min [M+H]+ 435.1. 1H NMR (CDC3, 400 MHz): δ 8.15-8.14 (1H, m), 7.76 (1H, td, J=8.52, 2.20 Hz), 7.67 (1H, s), 7.33 (1H, dd, J=8.45, 3.89 Hz), 7.15-7.15 (1H, m), 6.96 (1H, d, J=8.43 Hz), 4.46-4.45 (4H, m), 3.03-2.98 (4H, m), 2.20 (2H, t, J=11.00 Hz), 2.06-1.94 (3H, m), 1.66-1.62 (2H, m), 1.06 (9H, s)

Workup

  1. customwas purged with argon
  2. custommicrowave irradiation
  3. filtrationThe reaction mixture was filtered through Celite®
  4. concentrationthe filtrate concentrated in vacuo
  5. washwas washed with MeOH
  6. washthe product eluted with 2M NH3/MeOH
  7. customThe resulting residue was purified by column chromatography (Si-PCC, gradient 0-20% MeOH in DCM
  8. washwas washed with MeOH
  9. washthe product eluted with 2M NH3/MeOH affording 154 as a white solid (36 mg, 15%)

Sources & evidence

ORD record
ord-74b56abfc1dd4645901f6bf379ea2fc2
Source dataset
uspto-grants-2015_07
Patent number
US09090628B2

Reaction notes

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