Acetyl chloride → HCID 76568181, compound

HRID 1728141Notes

Reaction equation

[Br:1][C:2]1[CH:3]=[C:4]([CH:7]=[CH:8][C:9]=1[F:10])[CH:5]=O.[C:11]([Si:15]([CH3:30])([CH3:29])[O:16][CH2:17][CH2:18]OC1C=CC(I)=CC=1C=O)(C)(C)C.C[Si]([NH:35][Si](C)(C)C)(C)C.C([Li])CCC.C[Si](Cl)(C)C.C(N(CC)CC)C.C(Cl)(=O)C>>[Br:1][C:2]1[CH:3]=[C:4]([CH:5]=[N:35][C:17]([O:16][Si:15]([CH3:30])([CH3:29])[CH3:11])=[CH2:18])[CH:7]=[CH:8][C:9]=1[F:10]

Participants

Reactant 7

HCID 6367Acetyl chloride

HCID 6397Chlorotrimethylsilane

HCID 8471Triethylamine

HCID 13838Hexamethyldisilazane

HCID 1736043-Bromo-4-fluorobenzaldehyde

HCID 57565907HCID 57565907, compound

HCID 178418339Butyllithium

Product 1

HCID 76568181HCID 76568181, compound

Procedure

In a manner similar to the method described in example 190b, 3-bromo-4-fluorobenzaldehyde (4.6 g, 21 mmol) (Lancaster) was used as the starting material in place of 2-[2-(tert-butyl-dimethyl-silanyloxy)-ethoxy]-5-iodo-benzaldehyde to react with 1,1,3,3,3-hexamethyldisilazane (4.36 mL, 21 mmol), n-butyllithium (2.5 M, 8.4 mL, 21 mmol), trimethylsilyl chloride (2.66 mL, 21 mmol), triethylamine (3.8 mL, 27.2 mmol) and acetyl chloride (1.94 mL, 27.2 mmol) to give crude 1-(3-bromo-4-fluorophenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene as a yellow gum and used for the next step without further purification.

Sources & evidence

ORD record: ord-1a7d57f9ec894998a5e3297439c2cb90
Source dataset: uspto-grants-2009_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07495007B2

Reaction notes

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