Lithium Hexamethyldisilazide → HCID 25005525, compound

HRID 2196110Notes

Reaction equation

HRID 2196110 reaction equation
[Cl:1][C:2]1[CH:3]=[N:4][CH:5]=[C:6]([Cl:9])[C:7]=1[CH3:8].C[O:11][C:12]([C:14]1[C:29]2[O:28][CH2:27][C:21]3([CH2:26][CH2:25][O:24][CH2:23][CH2:22]3)[CH2:20][O:19][C:18]=2[C:17]([O:30][CH3:31])=[CH:16][CH:15]=1)=O.[Li+].C[Si]([N-][Si](C)(C)C)(C)C>C1COCC1>[Cl:1][C:2]1[CH:3]=[N:4][CH:5]=[C:6]([Cl:9])[C:7]=1[CH2:8][C:12]([C:14]1[C:29]2[O:28][CH2:27][C:21]3([CH2:26][CH2:25][O:24][CH2:23][CH2:22]3)[CH2:20][O:19][C:18]=2[C:17]([O:30][CH3:31])=[CH:16][CH:15]=1)=[O:11]

Participants

5

Reactant 3

HCID 2733832Lithium HexamethyldisilazideHCID 109538273,5-Dichloro-4-methylpyridineHCID 59286725HCID 59286725, compound

Product 1

HCID 25005525HCID 25005525, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Following the general procedure, condensation of 3,5-dichloro-4-methylpyridine (59 mg, 0.36 mmol) with compound 520 (85 mg, 0.28 mmol) in THF (1.5 mL) in the presence of LiHMDS (0.85 mL, 0.85 mmol) afforded compound 127 as a white solid material after purification by column chromatography (60-70% EtOAc in light petroleum). LC-MS: RT=3.70 min.; m/z 438.21, 440.21 (M+H)+, 436.30, 438.27 (M−H)−. 1H NMR (DMSO-d6): δ 8.65 (2H, s), 7.42 (1H, d, J 8.9), 6.87 (1H, d, J 9.0), 4.63 (2H, s), 4.25 (2H, s), 4.07 (2H, s), 3.84 (3H, s), 3.64 (4H, t, J 5.3), 1.60 (4H, t, J 5.3).

Sources & evidence

ORD record
ord-8e7678b39d3f4f129b2d47d3761938f0
Source dataset
uspto-grants-2012_12
Patent number
US08338431B2

Reaction notes

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