Ethyl Acetate → 4-[4-(6-Methanesulfonyl-2-methyl-pyridin-3-ylamino)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidine-1-carboxylic acid tert-butyl ester

HRID 1931616Notes

Reaction equation

HRID 1931616 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([N:14]2[C:18]3=[N:19][CH:20]=[N:21][C:22](Cl)=[C:17]3[CH:16]=[N:15]2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH3:24][S:25]([C:28]1[N:33]=[C:32]([CH3:34])[C:31]([NH2:35])=[CH:30][CH:29]=1)(=[O:27])=[O:26].CC(C)([O-])C.[Na+].C(OCC)(=O)C>CN(C)C=O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C.C(N1CCN2CCN(CC(C)C)P1N(CC(C)C)CC2)C(C)C.O>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([N:14]2[C:18]3=[N:19][CH:20]=[N:21][C:22]([NH:35][C:31]4[C:32]([CH3:34])=[N:33][C:28]([S:25]([CH3:24])(=[O:27])=[O:26])=[CH:29][CH:30]=4)=[C:17]3[CH:16]=[N:15]2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

9

Reactant 4

HCID 8857Ethyl AcetateHCID 23676156Sodium t-butoxideHCID 510505272-Methyl-6-(methylsulfonyl)pyridin-3-amine2×HCID 57964905Tert-butyl 4-(4-chloro-1H-pyrazolo[3,4-D]pyrimidin-1-YL)piperidine-1-carboxylate2×

Product 1

HCID 579650384-[4-(6-Methanesulfonyl-2-methyl-pyridin-3-ylamino)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidine-1-carboxylic acid tert-butyl esterYield 46.5%

Reagents, catalysts & solvents 4

HCID 167845palladium(II) acetateCatalystHCID 45712432,8,9-Triisobutyl-2,5,8,9-tetraaza-1-phosphabicyclo(3.3.3)undecaneCatalystHCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
160 °C

Procedure

A mixture of 4-(4-chloro-pyrazolo[3,4-d]pyrimidin-1-yl)-piperidine-1-carboxylic acid tert-butyl ester (Intermediate 19; 50 mg, 0.15 mmol), 6-methanesulfonyl-2-methyl-pyridin-3-ylamine (Intermediate 4; 28 mg, 0.15 mmol), palladium acetate (0.33 mg, 0.01 equivalent), sodium tert-butoxide (34 mg, 0.36 mmol), and 2,8,9-triisobutyl-2,5,8,9-tetraaza-1-phosphabicyclo[3.3.3]undecane (Aldrich, 1 mg, 0.02 equivalents) in dimethylformamide (2 mL) was heated in the microwave oven at 160° C. for 10 min. Ethyl acetate and water were added, and the aqueous layer was extracted three times with ethyl acetate. The ethyl acetate layers were combined, evaporated, and purified by preparative C18 HPLC, eluting with 10-100% acetonitrile/water. Samples containing the product were extracted twice with dichloromethane and the solvent was evaporated under high vacuum to give 4-[4-(6-methanesulfonyl-2-methyl-pyridin-3-ylamino)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidine-1-carboxylic acid tert-butyl ester (34 mg, 46%) as a white powder. 1H NMR (300 MHz, DMSO-d6) δ 1.41 (s, 9H), 1.92-2.00 (m, 4H), 2.55 (s, 3H), 2.90-3.04 (m, 2H), 3.30 (water peak and SO2CH3 peak), 4.00-4.12 (m, 2H), 4.84-4.96 (m, 1H), 7.92 (d, 1H, J=8.5 Hz), 8.22-8.36 (m, 3H), 10.06 (br s, 1H). HRMS Calcd. for C22H30N7O4S (MH+): 488.2075. Found: 488.2073.

Workup

  1. extractionthe aqueous layer was extracted three times with ethyl acetate
  2. customevaporated
  3. custompurified by preparative C18 HPLC
  4. washeluting with 10-100% acetonitrile/water
  5. additionSamples containing the product
  6. extractionwere extracted twice with dichloromethane
  7. customthe solvent was evaporated under high vacuum

Sources & evidence

ORD record
ord-8c91bf875d8d41d19b36e180939ab61e
Source dataset
uspto-grants-2012_05
Patent number
US08188098B2

Reaction notes

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