The yields of other cyclic acetals were between 62.
并在此条件下合成了多种环缩醛，收率62。
Eight acetals (Ketals) were synthesized under the optimal conditions.
在最佳条件下，合成了八个缩醛(酮)化合物。
The effect of polyvinyl acetals on its adhesive strength was investigated.
探讨了聚乙烯醇缩醛的粘接强度的影响。
The hydroxyl groups can be changed into esters, ethers, acetals and ketals, etc.
最常用的羟基保护基可归纳为三类：酯类、醚类和缩醛或缩酮类。
The synthetic conditions of acetals and ketals catalyzed by copper sulfate were studied.
研究了硫酸铜催化缩醛（酮）的合成条件，考察了硫酸铜催化剂的使用性能；
The IR and NMR spectra of the polymers indicated that the polymer structure contained ester and ketone units in the backbone, and a cyclic acetals as side chain.
通过对该合聚物的IR和NMR谱图分析，得知该聚合物含有酯基和酮基的结构单元，以及环缩醛的侧链。
Catalytic rectification preparation armour acetals technology at present domestic has not been formed mass industrial production, have certain development application value.
催化精馏制备甲缩醛工艺目前国内尚未形成大规模工业化生产，具有一定的开发应用价值。
The invention relates to garland chrysanthemum extract compounds, and a synthesis method and application thereof. The compounds have enol ether-spiro ketal-acetals and unsaturated side chains.
本发明茼蒿素类化合物及其合成方法与应用，该化合物具有烯醇醚-螺环缩酮-缩醛和不饱和侧链。
This paper investigates the catalysis of D-72 strong acid cation exchange resin on the synthesis of acetals, and systematically discusses the influence of reaction factors on the catalysis reaction.
研究了强酸性阳离子交换树脂对缩醛合成反应的催化作用，系统地探讨了各反应因素对反应的影响，研究发现，D- 72强酸性阳离子交换树脂具有较高的催化活性，并能重复使用。
This paper reports the study on the sulfonated polystyrene resin used in esterification, transesterification, synthesis of acetals or ketals, synthesis of ether and rearrangement reaction of pinacol.
本文研究了磺酸化的聚苯乙烯树脂在酯化、酯交换、缩醛或缩酮的合成、醚的合成及(口片)呐重排反应中的应用。
This paper reports the study on the sulfonated polystyrene resin used in esterification, transesterification, synthesis of acetals or ketals, synthesis of ether and rearrangement reaction of pinacol.
本文研究了磺酸化的聚苯乙烯树脂在酯化、酯交换、缩醛或缩酮的合成、醚的合成及(口片)呐重排反应中的应用。
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