1H-Pyrazolo[3,4-d]pyrimidin-4-amine → HCID 178508725, compound

HRID 1846062Notes

Reaction equation

[NH:1]1[C:5]2=[N:6][CH:7]=[N:8][C:9]([NH2:10])=[C:4]2[CH:3]=[N:2]1.[I:11]NC(=O)CCC(N)=O>>[I:11][C:3]1[C:4]2[C:5](=[N:6][CH:7]=[N:8][C:9]=2[NH2:10])[NH:1][N:2]=1

Participants

Reactant 2

HCID 754201H-Pyrazolo[3,4-d]pyrimidin-4-amine

HCID 21864724N-Iodosuccinamide

Product 1

HCID 178508725HCID 178508725, compound

Procedure

Halogenation of commercially available 1H-pyrazolo[3,4-d]pyrimidin-4-amine provides an entry into the synthesis of compounds of Formula (A), (B), (C) and/or (D). In one embodiment, 1H-pyrazolo[3,4-d]pyrimidin-4-amine is treated with N-iodosuccinamide to give 3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine. Metal catalyzed cross coupling reactions are then carried out on 3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine. In one embodiment, palladium mediated cross-coupling of a suitably substituted phenyl boronic acid under basic conditions constructs intermediate 2. Intermediate 2 is coupled with N-Boc-3-hydroxypiperidine (as non-limiting example) via Mitsunobu reaction to give the Boc (tert-butyloxycarbonyl) protected intermediate 3. After deprotection with acid, coupling with, but not limited to, an acid chloride, such as, but not limited to, acryloyl chloride, completes the synthesis to give compound 4.

Sources & evidence

ORD record: ord-9d015f8804a047cbb71e4883845156b3
Source dataset: uspto-grants-2015_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08952015B2

Reaction notes

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