Triphenylphosphine → HCID 178501318, compound

HRID 244170Notes

Reaction equation

HRID 244170 reaction equation
[Cl:1][C:2]1[C:3]2[C:10]([I:11])=[CH:9][NH:8][C:4]=2[N:5]=[CH:6][N:7]=1.[CH3:12][O:13][C:14]([C@H:16]1[CH2:19][C@H:18](O)[CH2:17]1)=[O:15].C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C>C1COCC1>[CH3:12][O:13][C:14]([C@H:16]1[CH2:19][C@@H:18]([N:8]2[C:4]3[N:5]=[CH:6][N:7]=[C:2]([Cl:1])[C:3]=3[C:10]([I:11])=[CH:9]2)[CH2:17]1)=[O:15]

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 5363146Diisopropyl azodicarboxylateHCID 148092816-Chloro-7-iodo-7-deazapurineHCID 178501328HCID 178501328, compound

Product 1

HCID 178501318HCID 178501318, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
85 °C

Procedure

To a mixture of 4-chloro-5-iodo-7H-pyrrolo[2,3-d]pyrimidine (prepared according to: L. B. Townsend et al., J. Med. Chem. 1990, 33 (7), 1984-92) (2.10 g, 7.51 mmol), trans-3-hydroxycyclobutanecarboxylic acid methyl ester (trans/cis=5:1) (1.11 g, 8.53 mmol), and PS—PPh3 (loading 2.21 mmol/g; 6.80 g, 15.0 mmol) in dry THF (80 mL), cooled by ice/water, was added DIAD (2.20 mL, 2.26 g, 11.2 mmol), then the cooling bath was removed, and the mixture was vortexed (150 rpm) overnight. The resin was filtered off and washed thoroughly with THF (≈400 mL), the filtrate and washings were combined, concentrated, and chromatographed on silica gel [Jones Flashmaster, 50 g/150 mL cartridge, eluting with CH2Cl2 (1-16)→5% EtOAc in CH2Cl2 (17-40)]. Fractions 3-32 were combined, concentrated, and suspended in iPrOH (10 mL). The suspension was heated to 85° C. for 20 min and cooled to −20° C. for 2 h, the solid was filtered off, washed with cold (−20° C.) iPrOH, and dried in vacuo. One obtained the title compound as white solid. Analytically pure material with cis/trans=50:1 had a melting point of 168-169° C. 1H NMR (CDCl3, 400 MHz): δ=2.66-2.78 (m, 2H), 2.81-2.93 (m, 2H), 3.06 (quint, J=8.7 Hz, 1H), 3.76 (s, 3H), 5.32 (quint, J=8.7 Hz, 1H), 7.68 (s, 1H), 8.60 (s, 1H). 13C NMR (CDCl3, 100.6 MHz, DEPT135): δ=30.93 (+), 34.09 (2C, −), 44.65 (+), 51.58 (Cquart), 52.19 (+), 117.07 (Cquart), 131.87 (+), 150.48 (Cquart), 150.72 (+), 152.69 (Cquart), 174.31 (Cquart). MS (ES+): m/z 391.9/393.9 (100/38) [MH+]. HPLC: tR=3.5 min (OpenLynx, polar—5 min). C12H11ClIN3O2 (391.60): C: calc. 36.81. found 36.88/36.78. H: calc. 2.83. found 2.81/2.76. N: calc. 10.73. found 10.59/10.50.

Workup

  1. customthe cooling bath was removed
  2. custom(150 rpm) overnight
  3. filtrationThe resin was filtered off
  4. washwashed thoroughly with THF (≈400 mL)
  5. concentrationconcentrated
  6. customchromatographed on silica gel [Jones Flashmaster, 50 g/150 mL cartridge
  7. washeluting with CH2Cl2 (1-16)→5% EtOAc in CH2Cl2 (17-40)]
  8. concentrationconcentrated
  9. temperaturecooled to −20° C. for 2 h
  10. filtrationthe solid was filtered off
  11. washwashed with cold (−20° C.) iPrOH
  12. customdried in vacuo

Sources & evidence

ORD record
ord-fcd0d56eac234749812b26d4a06443a4
Source dataset
uspto-grants-2014_02
Patent number
US08653268B2

Reaction notes

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