2-Chloro-4-hydroxybenzaldehyde 98%
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2-Chloro-4-hydroxybenzaldehyde 98%
structure -
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CAS No:
54439-75-7
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Formula:
C8H7ClO2
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Chemical Name:
2-Chloro-4-hydroxybenzaldehyde 98%
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Synonyms:
Benzaldehyde, 2-chloro-4-Methoxy-
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CAS No:
2-Chloro-4-hydroxybenzaldehyde 98% Use and Manufacturing
Reference Example 20 Compound V (17.0 g, 0.1 mol) was added to a 500 mL three-necked flask, and tetrahydrofuran (100 mL) was added thereto, and stirring was started. Under a nitrogen atmosphere, tetramethylammonium lithium (LTMP) (44 mL, 0.1) was added dropwise at -40 °C. Lmol), after the addition is completed, continue to low temperatureStir for 0.5 hours, Then, a solution of 2, 3-difluorobenzaldehyde (16.6 g, 0.1 mol) in tetrahydrofuran was added dropwise, and the reaction was continued at -40 ° C for 1 hour.TLC point plate monitoring, after the disappearance of the raw material point, a saturated ammonium chloride solution was added dropwise below zero degree, ethyl acetate was added, and the organic layer was separated, dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. Yellow solid compound IV-4, 33.9 g, yield 83percent.
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