Lithium Hexamethyldisilazide → HCID 25005889, compound

HRID 2196115Notes

Reaction equation

HRID 2196115 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][S:25][CH2:24][S: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][S:25][CH2:24][S: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 59286717HCID 59286717, compound

Product 1

HCID 25005889HCID 25005889, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Following the general procedure, condensation of 3,5-dichloro-4-methylpyridine (154 mg, 0.95 mmol) with compound 526 (250 mg, 0.73 mmol) in THF (4 mL) in the presence of LiHMDS (2.2 mL, 2.2 mmol) afforded compound 132 as a white solid material after purification by column chromatography (45-55% EtOAc in light petroleum). LC-MS: RT=4.39 min.; m/z 472.15, 474.14 (M+H)+. 1H NMR (DMSO-d6): δ 8.65 (2H, s), 7.42 (1H, d, J 8.9), 6.88 (1H, d, J 8.9), 4.64 (2H, s), 4.43 (2H, s), 4.24 (2H, s), 3.85 (3H, s), 3.84 (2H, s), 2.91 (4H, s).

Sources & evidence

ORD record
ord-2c68965f58a345bb933473cc2fbb0c46
Source dataset
uspto-grants-2012_12
Patent number
US08338431B2

Reaction notes

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