(Dimethyl sulfide)trihydroboron → 4-[6-(4-Benzyloxy-2-fluoro-phenyl)-3-methyl-1-(tetrahydro-pyran-2-yl)-1H-pyrazolo[3,4-b]pyridin-4-ylmethyl]-3-phenyl-piperazine-1-carboxylic acid tert-butyl ester

HRID 2279089Notes

Reaction equation

HRID 2279089 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]([C:16]2[C:17]3[C:39]([CH3:40])=[N:38][N:37]([CH:41]4[CH2:46][CH2:45][CH2:44][CH2:43][O:42]4)[C:18]=3[N:19]=[C:20]([C:22]3[CH:27]=[CH:26][C:25]([O:28][CH2:29][C:30]4[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=4)=[CH:24][C:23]=3[F:36])[CH:21]=2)=O)[CH:10]([C:47]2[CH:52]=[CH:51][CH:50]=[CH:49][CH:48]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].B.CSC>C1COCC1>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([CH2:14][C:16]2[CH:21]=[C:20]([C:22]3[CH:27]=[CH:26][C:25]([O:28][CH2:29][C:30]4[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=4)=[CH:24][C:23]=3[F:36])[N:19]=[C:18]3[N:37]([CH:41]4[CH2:46][CH2:45][CH2:44][CH2:43][O:42]4)[N:38]=[C:39]([CH3:40])[C:17]=23)[CH:10]([C:47]2[CH:48]=[CH:49][CH:50]=[CH:51][CH:52]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 2

HCID 12423031(Dimethyl sulfide)trihydroboronHCID 900135244-[6-(4-Benzyloxy-2-fluoro-phenyl)-3-methyl-1-(tetrahydro-pyran-2-yl)-1H-pyrazolo[3,4-b]pyridine-4-carbonyl]-3-phenyl-piperazine-1-carboxylic acid tert-butyl ester

Product 1

HCID 900142534-[6-(4-Benzyloxy-2-fluoro-phenyl)-3-methyl-1-(tetrahydro-pyran-2-yl)-1H-pyrazolo[3,4-b]pyridin-4-ylmethyl]-3-phenyl-piperazine-1-carboxylic acid tert-butyl esterYield 51.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 529 mg of 4-[6-(4-benzyloxy-2-fluoro-phenyl)-3-methyl-1-(tetrahydro-pyran-2-yl)-1H-pyrazolo[3,4-b]pyridine-4-carbonyl]-3-phenyl-piperazine-1-carboxylic acid tert-butyl ester in 15 ml of dry THF 6 ml of borane-dimethylsulfide complex (1 M in DCM) was added slowly at r.t., and the reaction was heated to reflux for 30 min. The reaction was quenched by the addition of 3.75 ml of methanol, and the solvents were evaporated. The residue was purified by preparative HPLC (C18 column, acetonitrile/water gradient) yielding 266 mg (51%) of the title compound.

Workup

  1. temperaturethe reaction was heated
  2. temperatureto reflux for 30 min
  3. customThe reaction was quenched by the addition of 3.75 ml of methanol
  4. customthe solvents were evaporated
  5. customThe residue was purified by preparative HPLC (C18 column, acetonitrile/water gradient)

Sources & evidence

ORD record
ord-9e93154d37e24e8a98124cc4fae3fe24
Source dataset
uspto-grants-2015_09
Patent number
US09133181B2

Reaction notes

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