- A kind of acrylic acid (N - methyl perfluoroalkyl sulfuryl amidogen) ethyl ester preparation method
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The invention relates to an acrylic acid (N - methyl perfluoroalkyl sulfuryl amidogen) ethyl ester preparation method, comprising the following steps: S1. In order to perfluoroalkyl-fluoride and methylamine as raw materials, inorganic salt aqueous solution as the solvent, remain below the 4 °C temperature of reaction, shall be N - methyl perfluoroalkyl sulfonamide; S2. Under the action of the alkaline catalyst, S1 of the prepared N - methyl perfluoroalkyl sulfonamide with vinyl carbonate reaction, shall be N - hydroxyethyl - N - methyl perfluoroalkyl sulfonamide; S3. In the presence of hydroquinone, S2 prepared N - hydroxyethyl - N - methyl perfluoroalkyl sulfonamide with acrylic acid methyl ester exchange reaction, be acrylic acid (N - methyl perfluoroalkyl sulfuryl amidogen) acetic ester. The advantage is: in order to salt water solution is used as the preparation N - methyl perfluoroalkyl sulfonamide solvent, overcome in the prior art that use only the bias of the non-aqueous solvent, in the final waste water content greatly reduced COD, environment-friendly; yield and high purity.
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Paragraph 0027; 0030; 0032; 0035
(2019/07/04)
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- Functional fluorescent dyes
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Fluorescent functional dyes represented by the following formulas: wherein R1 is hydrogen or methyl; R2, R3, R4, R5, and R6 are each independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, aralkyl, alkaryl, halo, and trifluoromethyl; and L is a straight chain or branched chain alkylene containing 3 to about 15 carbon atoms, the alkylene group optionally containing one or more catenary heteroatoms.
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