对相转移催化合成2-戊叉环戊酮及其异构化的条件进行了研究。
The synthetic conditions of 2-pentylidene cyclopentenone using PTC were stud-ied, and the conditions of isomerization were also studied.
异构数据源的合成是数据集成的一项重要功能，功能涉及数据冲突解决、数据复制和复杂的数据源交并差运算等。
Heterogeneous data synthesis is an important function of data integration. It involves data conflict resolution, data replication and more complex operation such as join, merge and difference.
可以使用立体选择或立体专一的合成方法，或者外消旋混合物的分离，来获得单独的光学异构体。
Use of stereoselective or stereospecific synthetic methods or separation of racemic mixtures can be used to obtain individual optical isomers.
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