天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List 3-BROMO-4-FLUOROBENZALDOXIME
202865-63-2

3-BROMO-4-FLUOROBENZALDOXIME synthesis

1synthesis methods
77771-02-9 Synthesis
3-Bromo-4-fluorobenzaldehyde

77771-02-9
382 suppliers
$15.00/25g

-

Yield:202865-63-2 88.5%

Reaction Conditions:

with hydroxyamino hydrochloride;anhydrous Sodium acetate in ethanol at 45; for 1 h;

Steps:

16.A A. Preparation of 3-bromo-4-fluorobenzaldehyde oxime

In a jar, 3-bromo-4-fluorobenzaldehyde (10.0 g, 49.3 mmol), hydroxylamine hydrochloride (4.5 g, 64.0 mmol) and anhydrous sodium acetate (8.1 g, 98.5 mmol) were dissolved in ethanol (100 mL) , 45 °C reaction 1h.After the reaction is completed, it is cooled to room temperature, filtered by suction, the filter cake is washed with ethanol (50 mL×3), the filtrates are combined, and the solvent is evaporated under reduced pressure.The residue was dissolved in ethyl acetate (100 mL), washed with pure water (100 mL×2), dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure to give 3-bromo-4-fluorobenzaldehyde oxime as a white solid 9.5 g. The yield was 88.5. %.

References:

CN107382892,2017,A Location in patent:Paragraph 0160; 0161

3-BROMO-4-FLUOROBENZALDOXIME Related Search: