Unit 1 Production of Drugs

Depending on their production or origin pharmaceutical agents can be split into three groups:

I .Totally synthetic materials (synthetics)，

Ⅱ.Natural products，and

Ⅲ.Products from partial syntheses (semi-synthetic products).

The emphasis of the present book is on the most important compounds of groups I and Ⅲ一thus Drug synthesis. This does not mean，however，that natural products or other agents are less important. They can serve as valuable lead structures，and they are frequently needed as starting materials or as intermediates for important synthetic products.

Table 1 gives an overview of the different methods for obtaining pharmaceutical agents.

1单元生产的药品

其生产或出身不同药剂可以分为三类：

1。完全（合成纤维）合成材料，

Ⅱ。天然产物，和

Ⅲ。产品从（半合成产品）的部分合成。

本书的重点是团体的最重要的化合物Ⅰ和Ⅲ一所以药物