Cesium carbonate → (R,Z)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one O-2-((S)-2,2-dimethyl-1,3-dioxolan-4-yl)ethyl oxime

HRID 656608Notes

Reaction equation

HRID 656608 reaction equation
[NH2:1][C:2]1[N:3]=[C:4]([CH3:22])[C:5]2=[C:6]([CH2:8][C@H:9]([C:14]3[CH:19]=[CH:18][C:17]([F:20])=[CH:16][C:15]=3[Br:21])[NH:10]/[C:11]/2=[N:12]\[OH:13])[N:7]=1.C([O-])([O-])=O.[Cs+].[Cs+].I[CH2:30][CH2:31][C@H:32]1[CH2:36][O:35][C:34]([CH3:38])([CH3:37])[O:33]1>CN(C=O)C>[CH3:37][C:34]1([CH3:38])[O:33][C@@H:32]([CH2:31][CH2:30][O:13]/[N:12]=[C:11]2\[NH:10][C@@H:9]([C:14]3[CH:19]=[CH:18][C:17]([F:20])=[CH:16][C:15]=3[Br:21])[CH2:8][C:6]3[N:7]=[C:2]([NH2:1])[N:3]=[C:4]([CH3:22])[C:5]\2=3)[CH2:36][O:35]1

Participants

5

Reactant 3

HCID 10796Cesium carbonateHCID 11076039(4S)-4-(2-iodoethyl)-2,2-dimethyl-1,3-dioxolaneHCID 178433358HCID 178433358, compound

Product 1

HCID 178433346(R,Z)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one O-2-((S)-2,2-dimethyl-1,3-dioxolan-4-yl)ethyl oximeYield 63.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of (R,Z)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one oxime (85c, 9.2 mg, 0.025 mmol) in dry DMF (1 mL) was added Cs2CO3 (12.2 mg, 0.0375 mmol) and the reaction mixture stirred at ambient temperature for 30 minutes. Then, (S)-4-(2-iodoethyl)-2,2-dimethyl-1,3-dioxolane (85d, 7.68 mg, 0.03 mmol) was added and the reaction mixture stirred overnight. LCMS showed complete consumption of the starting material. The reaction mixture was poured onto crushed ice and the resulting solid was filtered and rinsed with cold water. Drying afforded (R,Z)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one O-2-((S)-2,2-dimethyl-1,3-dioxolan-4-yl)ethyl oxime (7.8 mg, 63%) as a light brown solid. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.35 (s, 3H) 1.41 (s, 3H) 2.02 (qd, J=6.32, 3.03 Hz, 2H) 2.75 (s, 3H) 2.94 (dd, J=16.42, 8.84 Hz, 1H) 3.17 (dd, J=16.42, 4.55 Hz, 1H) 3.59 (dd, J=8.08, 7.07 Hz, 1H) 4.09 (dd, J=8.08, 6.06 Hz, 1H) 4.17-4.28 (m, 3H) 4.98 (ddd, J=8.72, 4.55, 1.64 Hz, 1H) 7.07 (td, J=8.27, 2.65 Hz, 1H) 7.34 (dd, J=8.08, 2.78 Hz, 1H) 7.43 (dd, J=8.72, 5.94 Hz, 1H). MS (ES) [M+H] calculated for C21H27BrFN5O3, 495.11. found 495.30.

Workup

  1. stirringthe reaction mixture stirred overnight
  2. customconsumption of the starting material
  3. additionThe reaction mixture was poured
  4. customonto crushed ice
  5. filtrationthe resulting solid was filtered
  6. washrinsed with cold water
  7. customDrying

Sources & evidence

ORD record
ord-e174e3572946411f961945dfbc2d8f5e
Source dataset
uspto-grants-2011_12
Patent number
US08071766B2

Reaction notes

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