英语语法分析

Allylic amine derivatives are inexpensive to prepare and are very stable.

烯胺衍生物是廉价的准备，而且非常稳定。

Chlorination occurs adjacent to the isoprene units to form allylic chlorines.

氯化发生在异戊二烯单元附近形成烯丙基氯。

Thus, the reaction with aryl-substituted allylic carbonates is regioselective.

因此，与芳基取代的烯丙基碳酸反应选择性。