近年来稠杂环的合成及其生物活性的研究日益成为杂环化学研究的热门课题。
In recent years synthetic work on fused heterocyclic compounds and study of theirs biological activities were a hot topic in the field of study on heterocyclic chemistry.
咪唑并稠合碳环和杂环，它们的制备方法，含有它们的组合物以及它们的应用。
Imidazo-fused iso-and heterocycles, process for their preparation, compositions containing them and their use.
用醇作溶剂、微量的浓硫酸作催化剂，稠合双环氮杂环丙烷衍生物可发生区域选择性氮杂环开环反应。
Bicyclic fused aziridines can generate regioselective ring opening reaction with various alcohols, catalyzed by slight concentrated sulfuric acid.
所述含氮杂环状结构为氮杂大环或氮杂稠环或氮杂环状共轭对称或氮杂环状共轭不对称。
The nitrogen hetero atomic shape structure is aza big ring or aza condensed ring or nitrogen hetero atomic ring shape conjugate symmetry or nitrogen hetero atomic ring shape conjugate asymmetry.
中的杂环可以看作是一个被掩蔽的，处于暂时停顿状态的稠环。
The heterocyele in (4) is a masked fused ring held in abeyance.
中的杂环可以看作是一个被掩蔽的，处于暂时停顿状态的稠环。
The heterocyele in (4) is a masked fused ring held in abeyance.
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