reaction promoter

The condensation-cyclization cascade reaction of aromatic aldehyde with two equiv of 4-hydroxy-6-methyl-pyrone in the presence of acetic anhydride was studied by using ionic liquid as both reaction medium and promoter.

研究了在离子液体介质中，芳香醛和两分子6-甲基-4-羟基吡喃酮在乙酸酐存在下的缩合成环反应，并通过该反应合成了一系列双吡喃酮并吡喃类化合物。

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In other words, the trace amount of HF acts as a reaction promoter and can raise the catalyst selectivity for the alkylation significantly.

这是一个重要和有趣的实验现象，它说明微量HF反应助剂可大幅度提高固体酸催化剂对烷基化反应的选择性。

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Behavior of Trace Amount of HF Reaction Promoter in Alkylation Catalyzed by Solid Acid ⅰ. Promotion Effect of Promoter on Reaction

固体酸催化烷基化反应中微量氟化氢反应助剂的作用Ⅰ.助剂对反应的促进效应

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The basic group, the reaction promoter and the order of addition are all important variables in the glucuronidation.

糖基受体中的碱性基团、反应促进剂和加料顺序都是葡萄糖苷酸化反应的重要影响因素。化合物36和42分别经碱水解，制得苯丙哌林羟基化衍生物的葡萄糖苷酸21和22。

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