Classification of Pharmaceutical Intermediates

Medical intermediates can be classified into various types based on their chemical structure and reaction properties. Common classification methods include:

1. Intermediates in the synthesis pathway: These intermediates directly participate in the synthesis steps of drugs and represent key intermediate products in different reaction stages.

2. Structural similarity: This intermediate is very similar in structure to the target drug, but may require further modification during the synthesis process.

3. Functional similarity: The chemical function of this intermediate is similar to that of the target drug, but it plays a more effective role in the synthesis pathway.