Triethylamine → 6-N-(4-Monomethoxytrityl)-9-(2-deoxy-5-O-(4-monomethoxytrityl)-beta-L-erythropentofuranosyl)adenine

HRID 1712906Notes

Reaction equation

HRID 1712906 reaction equation
[CH3:1][O:2][C:3]1[CH:68]=[CH:67][C:6]([C:7]([NH:20][C:21]2[N:29]=[CH:28][N:27]=[C:26]3[C:22]=2[N:23]=[CH:24][N:25]3[C@H:30]2[O:43][C@@H:42]([CH2:44][O:45][C:46]([C:61]3[CH:66]=[CH:65][CH:64]=[CH:63][CH:62]=3)([C:55]3[CH:60]=[CH:59][CH:58]=[CH:57][CH:56]=3)[C:47]3[CH:52]=[CH:51][C:50]([O:53][CH3:54])=[CH:49][CH:48]=3)[C@H:32]([O:33]C(=O)C3C=CC=CC=3)[CH2:31]2)([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)=[CH:5][CH:4]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(N(CC)CC)C.C[Sn](C)(C)C>CN1CCCC1=O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C.O>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([C:7]([NH:20][C:21]2[N:29]=[CH:28][N:27]=[C:26]3[C:22]=2[N:23]=[CH:24][N:25]3[C@H:30]2[O:43][C@@H:42]([CH2:44][O:45][C:46]([C:61]3[CH:62]=[CH:63][CH:64]=[CH:65][CH:66]=3)([C:55]3[CH:56]=[CH:57][CH:58]=[CH:59][CH:60]=3)[C:47]3[CH:48]=[CH:49][C:50]([O:53][CH3:54])=[CH:51][CH:52]=3)[C@H:32]([OH:33])[CH2:31]2)([C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=2)[C:14]2[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=2)=[CH:67][CH:68]=1

Participants

8

Reactant 4

HCID 8471TriethylamineHCID 11661TetramethyltinHCID 11776TriphenylphosphineHCID 120709986-N-(4-Monomethoxytrityl)-9-(3-O-benzoyl-2-deoxy-5-O-(4-mono-methoxytrityl)-beta-L-erythro-pentofuranosyl)adenine

Product 1

HCID 120709996-N-(4-Monomethoxytrityl)-9-(2-deoxy-5-O-(4-monomethoxytrityl)-beta-L-erythropentofuranosyl)adenine

Reagents, catalysts & solvents 3

HCID 167845palladium(II) acetateCatalystHCID 962WaterSolventHCID 13387N-methyl-2-pyrrolidoneSolvent

Conditions

Temperature
105 °C

Procedure

A solution of the crude mixture 8, palladium acetate (3.44 g), triphenylphosphine (8.0 g) in N-methylpyrrolidinone (1375 ml) with triethylamine (4.3 ml) was stirred at room temperature for 45 min. Then, tetramethyltin (42.4 ml) was added dropwise at 0° C. under argon. After stirring at 100-110° C. overnight, the reaction mixture was poured into water and extracted with diethyl ether. The organic solution was dried over sodium sulfate and concentrated under reduced pressure. The residue was purified by a silica gel column chromatography [eluant: stepwise gradient of ethyl acetate (0-10%) in toluene] to give compound 9 as a foam (42.3 g, 48.3% for the 2 steps). 1H NMR (DMSO) δ ppm. 8.3-7.2 (m, 15H, 2 C6H5CO, 1 CH3C6H4CO, H-6), 6.29 (t, 1H, H-1′, J=7.0 Hz), 5.7 (m, 1H, H-3′), 4.7-4.5 (m, 3H, H-5′, H-5″, H-4′), 2.7-2.6 (m, 2H, H-2′, H-2″); FAB<0, (GT) m/e 567 (M−H)−, 449 (M-CH3C6H4CO)−, 243 (B)−, 121 (C6H5COO)—; FAB>0 (GT) 1137 (2M+H)+, 569 (M+H)+, 325 (M−B)−, 245 (B+2H)+, 19 (CH3C6H5CO)+.

Workup

  1. extractionextracted with diethyl ether
  2. dry with materialThe organic solution was dried over sodium sulfate
  3. concentrationconcentrated under reduced pressure
  4. customThe residue was purified by a silica gel column chromatography [eluant

Sources & evidence

ORD record
ord-ce6c42b5d5ec4bb59614b8634b9350c6
Source dataset
uspto-grants-2010_09
Patent number
US07795238B2

Reaction notes

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