Cesium carbonate → HCID 58424247, compound

HRID 1408696Notes

Reaction equation

Br[C:2]1[CH:3]=[C:4]2[C:11]3([O:15][N:14]([CH3:16])[C:13]([NH2:17])=[N:12]3)[CH2:10][CH:9]([CH:18]3[CH2:23][CH2:22][O:21][CH2:20][CH2:19]3)[O:8][C:5]2=[CH:6][CH:7]=1.[C:24]([C:26]1[CH:27]=[C:28](B(O)O)[CH:29]=[CH:30][CH:31]=1)#[N:25].C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[NH2:17][C:13]1[N:14]([CH3:16])[O:15][C:11]2([C:4]3[C:5](=[CH:6][CH:7]=[C:2]([C:30]4[CH:31]=[C:26]([CH:27]=[CH:28][CH:29]=4)[C:24]#[N:25])[CH:3]=3)[O:8][CH:9]([CH:18]3[CH2:23][CH2:22][O:21][CH2:20][CH2:19]3)[CH2:10]2)[N:12]=1

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of 6-bromo-2′-methyl-2-(tetrahydro-2H-pyran-4-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (50 mg, 0.131 mmol), 3-cyanophenylboronic acid (40 mg, 0.222 mmol), Cs2CO3 (2 M, 0.5 mL) and Pd(PPh3)2Cl2 (15 mg) in 1,4-dioxane (3 mL) under Ar was stirred in a microwave reactor at 120° C. for 35 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC and HPLC to give 3-(3′-amino-2′-methyl-2-(tetrahydro-2H-pyran-4-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-6-yl)benzonitrile (2.54 mg, 5%). 1H-NMR (CDCl3): 1.54 (m, 2H), 1.62 (m, 1H), 1.88 (m, 1H), 2.10 (m, 1H), 2.48 (m, 1H), 3.39 (m, 3H), 3.42 (m, 3H), 4.03 (m, 3H), 6.90 (m, 1H), 7.45 (m, 2H), 7.58 (m, 2H), 7.62 (m, 2H).

Workup

concentrationThe reaction mixture was concentrated in vacuo
customto give the residue, which
customwas purified preparative TLC and HPLC

Sources & evidence

ORD record: ord-aa8871700a2544f5b5742b9ab0c03f32
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08921359B2

Reaction notes

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