Triphenylphosphine → 6-cyclobutyl-3-(2-fluorophenyl)-5-(1-methyl-1H-1,2,4-triazol-3-ylmethoxy)-1,2,3-triazolo[1,5-alpha]pyrimidine

HRID 1250179Notes

Reaction equation

HRID 1250179 reaction equation
[CH:1]1([C:5]2[C:6](=[O:21])[NH:7][C:8]3[N:9]([N:11]=[N:12][C:13]=3[C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=3[F:20])[CH:10]=2)[CH2:4][CH2:3][CH2:2]1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH3:41][N:42]1[CH:46]=[N:45][C:44]([CH2:47]O)=[N:43]1.N(C(OCC)=O)=NC(OCC)=O>O1CCCC1>[CH:1]1([C:5]2[C:6]([O:21][CH2:47][C:44]3[N:45]=[CH:46][N:42]([CH3:41])[N:43]=3)=[N:7][C:8]3[N:9]([N:11]=[N:12][C:13]=3[C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=3[F:20])[CH:10]=2)[CH2:2][CH2:3][CH2:4]1

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 10351670(1-Methyl-1H-1,2,4-triazol-3-yl)methanolHCID 178518574HCID 178518574, compound

Product 1

HCID 1317230826-cyclobutyl-3-(2-fluorophenyl)-5-(1-methyl-1H-1,2,4-triazol-3-ylmethoxy)-1,2,3-triazolo[1,5-alpha]pyrimidineYield 60%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

6-Cyclobutyl-3-(2-fluorophenyl)-4H-1,2,3-triazolo[1,5-α]pyrimidin-5-one (50 g, 0.18 mmol), triphenylphosphine (120 mg, 0.44 mmol) and (1-methyl-1H-1,2,4-triazol-3-yl)methanol (50 g, 0.44 mmol) were suspended in dry tetrahydrofuran (1.5 ml). Diethyl azodicarboxylate (70 μl, 0.44 mmol) was added and a solution resulted immediately. The reaction was stirred at room temperature for 48 hours during which time a precipitate formed in the reaction mixture. The crude reaction mixture was evaporated and recrystallised from EtOAc. The pale pink crystalline solid thus produced was collected by filtration and washed with diethyl ether to afford 6-cyclobutyl-3-(2-fluorophenyl)-5-(1-methyl-1H-1,2,4-triazol-3-ylmethoxy)-1,2,3-triazolo[1,5-α]pyrimidine (40 mg, 60%) as pale needles, m.p. 202-205° C.; δH (400 MHz, CDCl3) 1.84-1.92 (1H, m, CH(CH2)3), 2.06-2.16 (3H, m, CH(CH2)3), 3.67 (1H, quintet, J=9 Hz, CH(CH2)3), 3.94 (3H, s, NCH3), 7.19-7.29 (2H, m, ArH), 7.32-7.36 (1H, m, ArH), 8.04 (1H, s, triazole CH), 8.12 (1H, td, J=7.5 and 1.8 Hz, ArH), 8.55 (1H, d, J=1.5 Hz, pyrimidine CH); m/z (ES+) 380 (M+H+).

Workup

  1. customa solution resulted immediately
  2. customformed in the reaction mixture
  3. customThe crude reaction mixture
  4. customwas evaporated
  5. customrecrystallised from EtOAc
  6. customThe pale pink crystalline solid thus produced
  7. filtrationwas collected by filtration
  8. washwashed with diethyl ether

Sources & evidence

ORD record
ord-dcea5d489d4d4a8fb2c7ccd2ff38d3d0
Source dataset
uspto-grants-2002_01
Patent number
US06337331B1

Reaction notes

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