4 - chloro-cinnamic acid

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4 - chloro-cinnamic acid
Posting date : Aug 25, 2010
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30-
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4 - chloro-cinnamic acid Quality Standard: Enterprise standard 99% Molecular formula: C9H7ClO2 Molecular Weight: 182.61 CAS No. :1615-02-7 Packing: 25KG / Bag Properties: colorless crystal. There are two cis-and trans. Soluble in ethanol, cis-the melting point 110.5 ℃, anti-type melting point 249-250 ℃. Preparation Methods: chlorobenzaldehyde with acetic anhydride reaction. Will chlorobenzaldehyde, acetic anhydride and sodium acetate with the reaction at 180 ℃ for 13h. Reaction completion, coolish, into the water, filtration, water washing cake, again with the ammonia solution, to only a small amount of brown sticky residue Web results so far. Will be filtered from ammonium solution, chlorine with 3N sulfuric acid will be re-precipitated, filtered, dried, so product. Production rate of about 80%. Purposes: organic synthesis intermediates for the synthesis of chlorobenzene acid, producing scattered enemy wheat herbicides.

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