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The title compounds containing trifluoroethoxy groups in the aryl sulfonyl rings and aroyl rings have been synthesized.

成了芳磺酰基环及芳酰基环上含有三氟乙氧基的标

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Four kinds of methods to synthesize o-Dichlorobenzaldehyde were introduced. the advantages of hydrolysis methods to reduce p-toluene sulfonyl chloride were discussed.

要介绍了四种二氯苯甲醛的成工艺路线,并比较利弊,阐述了对甲苯磺酰氯氯水解法的优越性。

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landgraviate, landgravine, landholder, landholding, landification, landing, landing craft, landing deck, landing field, landing flap,

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3G, 401(K), a,

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