英语语法分析

The synthesis of polysubstituted aromatic compounds by using a tandem cycloaddition aromatization reaction was reported.

报道了通过串联环加成芳构化反应合成多取代芳族化合物的方法。

The cycloaddition itself is the slow step.

环化作用本身是慢的一步。

These, cycloaddition reactions proceed with stereoselectivity.

上述反应具有(顺，反)立体选择性。