HCID 45257321, compound → (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 656584Notes

Reaction equation

HRID 656584 reaction equation
[NH2:1][C:2]1[N:3]=[C:4]([CH3:21])[C:5]2[C:11](=S)[NH:10][C@@H:9]([C:13]3[CH:18]=[CH:17][C:16]([F:19])=[CH:15][C:14]=3[Br:20])[CH2:8][C:6]=2[N:7]=1.[CH3:22][C:23]1([CH3:32])[O:27][C@@H:26]([CH2:28][CH2:29][O:30][NH2:31])[CH2:25][O:24]1>[Hg](OC(C)=O)OC(C)=O.C1(C)C=CC=CC=1>[CH3:22][C:23]1([CH3:32])[O:27][C@@H:26]([CH2:28][CH2:29][O:30]/[N:31]=[C:11]2\[NH:10][C@@H:9]([C:13]3[CH:18]=[CH:17][C:16]([F:19])=[CH:15][C:14]=3[Br:20])[CH2:8][C:6]3[N:7]=[C:2]([NH2:1])[N:3]=[C:4]([CH3:21])[C:5]\2=3)[CH2:25][O:24]1

Participants

5

Reactant 2

HCID 45257321HCID 45257321, compoundHCID 57999036(S)-O-(2-(2,2-dimethyl-1,3-dioxolan-4-yl)ethyl)hydroxylamine

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 65%

Reagents, catalysts & solvents 2

HCID 16683746DiacetyloxymercuryCatalystHCID 1140TolueneSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of (R)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidine-5(6H)-thione (31I, 100 mg, 0.3 mmol), (S)—O-(2-(2,2-dimethyl-1,3-dioxolan-4-yl)ethyl)hydroxylamine (194 mg, 1.2 mmol), Hg(OAc)2 (192 mg, 0.6 mmol) and anhydrous toluene (2 mL) was heated at 100° C. for 1 h. LCMS shows completion of the reaction. The mixture was cooled, filtered through celite and washed with ethyl acetate. Filtrate concentrated and the resulting oily residue was purified by preparative LCMS to afford (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 (35A, 87 mg, 65%) as a pale yellow solid. 1H NMR (400 MHz, CHLOROFORM-d) δ 1.35 (s, 3H) 1.40 (s, 3H) 2.01 (qd, J=6.32, 3.03 Hz, 2H) 2.76 (s, 3H) 2.95 (dd, J=16.42, 8.84 Hz, 1H) 3.18 (dd, J=17.18, 5.05 Hz, 1H) 3.56-3.62 (m, 1H) 4.09 (dd, J=7.96, 5.94 Hz, 1H) 4.16-4.28 (m, 2H) 4.98 (ddd, J=8.78, 4.61, 1.52 Hz, 1H) 7.07 (td, J=8.21, 2.53 Hz, 1H) 7.34 (dd, J=8.08, 2.53 Hz, 1H) 7.68 (dd, J=12.00, 6.95 Hz, 1H). MS (ES) [M+H] calculated for C21H26BrFN5O3, 494.11. found 494.00.

Workup

  1. customcompletion of the reaction
  2. temperatureThe mixture was cooled
  3. filtrationfiltered through celite
  4. washwashed with ethyl acetate
  5. concentrationFiltrate concentrated
  6. customthe resulting oily residue was purified by preparative LCMS

Sources & evidence

ORD record
ord-4a70a9fa8ae54da1996ba47653e5fd79
Source dataset
uspto-grants-2011_12
Patent number
US08071766B2

Reaction notes

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