Triphenylphosphine → (R)-tert-Butyl 3-(4-amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carboxylate

HRID 1529959Notes

Reaction equation

HRID 1529959 reaction equation
[I:1][C:2]1[C:10]2[C:5](=[N:6][CH:7]=[N:8][C:9]=2[NH2:11])[NH:4][N:3]=1.[C:12]([O:16][C:17]([N:19]1[CH2:24][CH2:23][CH2:22][C@H:21](O)[CH2:20]1)=[O:18])([CH3:15])([CH3:14])[CH3:13].C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C>C1COCC1>[NH2:11][C:9]1[N:8]=[CH:7][N:6]=[C:5]2[N:4]([C@@H:23]3[CH2:22][CH2:21][CH2:20][N:19]([C:17]([O:16][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:18])[CH2:24]3)[N:3]=[C:2]([I:1])[C:10]=12

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 1514399tert-butyl (3S)-3-hydroxypiperidine-1-carboxylateHCID 5363146Diisopropyl azodicarboxylateHCID 178508725HCID 178508725, compound

Product 1

HCID 58441419(R)-tert-Butyl 3-(4-amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carboxylateYield 41.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
70 °C

Procedure

To a solution of 3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-ylamine (4.0 g, 15.32 mmol, 1.0 eq), (S)-3-hydroxypiperidine-1-carboxylic acid tert-butyl ester (4.313 g, 21.44 mmol, 1.4 eq), and PPh3 (8.031 g, 30.64 mmol, 2.0 eq) in dry THF (200 mL), DIAD (4.658 g, 22.98 mmol, 1.5 eq) was added at room temperature. The reaction mixture was stirred at 70° C. for 72 h. The reaction mixture was concentrated and purified by silica gel chromatography (eluted with PE: EtOAc=1:1) to afford (R)-tert-butyl 3-(4-amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carboxylate (2.8 g, 41.2% in yield).

Workup

  1. concentrationThe reaction mixture was concentrated
  2. custompurified by silica gel chromatography (eluted with PE: EtOAc=1:1)

Sources & evidence

ORD record
ord-494ae370e06d4f18b3c7baad248a90f1
Source dataset
uspto-grants-2015_07
Patent number
US09090621B2

Reaction notes

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