4-(3,5-Dibromo-2-hydroxy-4-methoxy-phenyl)-2-[(Z)-hydroxyimino]-butyric acid methyl ester

Base Information

• Chemical Name: 4-(3,5-Dibromo-2-hydroxy-4-methoxy-phenyl)-2-[(Z)-hydroxyimino]-butyric acid methyl ester
• CAS No.: 873069-84-2
• Molecular Formula: C₁₂H₁₃Br₂NO₅
• Molecular Weight: 411.047
• Mol file: 873069-84-2.mol

Synonyms:4-(3,5-Dibromo-2-hydroxy-4-methoxy-phenyl)-2-[(Z)-hydroxyimino]-butyric acid methyl ester

Chemical Property of 4-(3,5-Dibromo-2-hydroxy-4-methoxy-phenyl)-2-[(Z)-hydroxyimino]-butyric acid methyl ester

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of 4-(3,5-Dibromo-2-hydroxy-4-methoxy-phenyl)-2-[(Z)-hydroxyimino]-butyric acid methyl ester

There total 3 articles about 4-(3,5-Dibromo-2-hydroxy-4-methoxy-phenyl)-2-[(Z)-hydroxyimino]-butyric acid methyl ester which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 98.0%

4-(2-benzyloxy-3,5-dibromo-4-methoxy-phenyl)-2-(tert-butyl-dimethyl-silanyloxy)-but-2-enoic acid methyl ester → 4-(3,5-Dibromo-2-hydroxy-4-methoxy-phenyl)-2-[(Z)-hydroxyimino]-butyric acid methyl ester (873069-84-2)

Guidance literature:

4-(2-benzyloxy-3,5-dibromo-4-methoxy-phenyl)-2-(tert-butyl-dimethyl-silanyloxy)-but-2-enoic acid methyl ester; With pyridine hydrogenfluoride; In methanol; at 20 ℃;

With hydroxylamine hydrochloride; at 20 ℃;

With hydrogen; palladium on activated charcoal; In 1,4-dioxane; acetic acid; at 20 ℃;

DOI:10.1016/j.tetlet.2005.10.157

Reference yield:

(2-benzyloxy-3,5-dibromo-4-methoxy-phenyl)-acetaldehyde (873069-82-0) → 4-(3,5-Dibromo-2-hydroxy-4-methoxy-phenyl)-2-[(Z)-hydroxyimino]-butyric acid methyl ester (873069-84-2)

Guidance literature:

Multi-step reaction with 2 steps

1.1: 98 percent / LHMDS / tetrahydrofuran / -78 °C

2.1: HF*pyridine / methanol / 20 °C

2.2: NH₂OH*HCl / 20 °C

2.3: 98 percent / H₂ / Pd/C / dioxane; acetic acid / 20 °C

With pyridine hydrogenfluoride; lithium hexamethyldisilazane; In tetrahydrofuran; methanol; 1.1: Horner-Wadsworth-Emmons olefination;

DOI:10.1016/j.tetlet.2005.10.157

Reference yield:

2-(benzyloxy)-3,5-dibromo-4-methoxybenzaldehyde (35031-47-1) → 4-(3,5-Dibromo-2-hydroxy-4-methoxy-phenyl)-2-[(Z)-hydroxyimino]-butyric acid methyl ester (873069-84-2)

Guidance literature:

Multi-step reaction with 3 steps

1.1: t-BuOK / tetrahydrofuran / 20 °C

1.2: 97 percent / HCl / tetrahydrofuran / Heating

2.1: 98 percent / LHMDS / tetrahydrofuran / -78 °C

3.1: HF*pyridine / methanol / 20 °C

3.2: NH₂OH*HCl / 20 °C

3.3: 98 percent / H₂ / Pd/C / dioxane; acetic acid / 20 °C

With potassium tert-butylate; pyridine hydrogenfluoride; lithium hexamethyldisilazane; In tetrahydrofuran; methanol; 1.1: Wittig reaction / 2.1: Horner-Wadsworth-Emmons olefination;

DOI:10.1016/j.tetlet.2005.10.157

upstream raw materials:

(2-benzyloxy-3,5-dibromo-4-methoxy-phenyl)-acetaldehyde

2-(benzyloxy)-3,5-dibromo-4-methoxybenzaldehyde