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。

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。

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。

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