Triphenylphosphine → HCID 10258600, compound

HRID 1708103Notes

Reaction equation

HRID 1708103 reaction equation
[Cl:1][C:2]1[N:10]=[CH:9][N:8]=[C:7]2[C:3]=1[NH:4][CH:5]=[N:6]2.[Si:11]([O:28][CH2:29][CH:30]([CH2:43]O)/[CH:31]=[CH:32]/[P:33](=[O:42])([O:38][CH:39]([CH3:41])[CH3:40])[O:34][CH:35]([CH3:37])[CH3:36])([C:24]([CH3:27])([CH3:26])[CH3:25])([C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>CN(C)C=O>[Si:11]([O:28][CH2:29][CH:30](/[CH:31]=[CH:32]/[P:33]([O:38][CH:39]([CH3:41])[CH3:40])([O:34][CH:35]([CH3:36])[CH3:37])=[O:42])[CH2:43][N:6]1[CH:5]=[N:4][C:3]2[C:7]1=[N:8][CH:9]=[N:10][C:2]=2[Cl:1])([C:24]([CH3:27])([CH3:26])[CH3:25])([C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[C:12]1[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=1

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 53592776-ChloropurineHCID 10436173diisopropyl (E)-3-(t-butyldiphenylsilyloxy)methyl-4-hydroxybut-1-enylphosphonate

Product 1

HCID 10258600HCID 10258600, compoundYield 28%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 6-chloropurine (213 mg, 1.37 mmol), diisopropyl (E)-3-(t-butyldiphenylsilyloxy)methyl-4-hydroxybut-1-enylphosphonate (694 mg, 1.37 mmol) and triphenyl phosphine (540 mg, 2.06 mmol) in N,N-dimethylformamide (22 ml) stirred at 0° C. under dry nitrogen was added diethyl azodicarboxylate (358 mg, 2.06 mmol). The solution was stirred at room temperature for 16 h. The solvent was removed and the residue purified by column chromatography on silica gel eluting with acetone-hexane (1:4, 1:2) then ethyl acetate-methanol (99:1, 9:1) to give (E)-9-[2-(t-butyldiphenylsilyloxy) methyl-4-(diisopropoxyphosphoryl)but-3-enyl]-6-chloropurine as a colourless gum (244 mg, 28%); λmax (EtOH) 265 (9,215nm; υmax (film) 2980, 2930, 1590, 1560, 1425, 1385, 1335 and 1245 cm-1 ; δH (CDCl3) 1.10 (9H, s, CH3), 1.20 (12H, m, CH (CH3)2), 3.07 (1H, m, CH), 3.69 (2H, d, J 6 Hz, CH2O ), 4.50 (4H, m, CH2N and CH(CH3)2), 5.57 (1H, pseudo-t, J 17 Hz, PCH=CH), 6.66 (1H, ddd, J 8 Hz, 17 Hz and 26 Hz, PCH=CH), 7.30-7.70 (10H, m, Ph), 8.00 (1H, s, H-2/H-8), 8.73 (1H, s, H-2/H-8) (Found: M+ 641.2459. C32H42N4ClO4PSi requires M+ 641.2479).

Workup

  1. customThe solvent was removed
  2. customthe residue purified by column chromatography on silica gel eluting with acetone-hexane (1:4, 1:2)

Sources & evidence

ORD record
ord-2f62586b1c7e465bb51f0ab4948b939e
Source dataset
uspto-grants-1994_10
Patent number
US05356886

Reaction notes

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