2-Fluoro-5-formylbenzonitrile

I. Core Pharmaceutical Application: Key Intermediate for PARP Inhibitor (Olaparib)

1. Olaparib is the world’s first approved PARP (Poly ADP-Ribose Polymerase) targeted anti-cancer drug, used for the treatment of malignant tumors such as advanced ovarian cancer, metastatic breast cancer, and metastatic castration-resistant prostate cancer. It achieves targeted killing by inhibiting the DNA repair pathway of tumor cells, and this product provides the necessary aromatic ring fragment for the construction of its molecular skeleton.
2. Through multiple reactions such as condensation, cyclization and hydrolysis, this product can be converted into 2-fluoro-5-[(4-oxo-3,4-dihydrophthalazin-1-yl)methyl]benzoic acid, a key intermediate of Olaparib, directly supporting the process synthesis and large-scale production of this API.
3. The synergistic effect of aldehyde group, cyano group and fluorine atom in its molecule can ensure the selectivity and yield of subsequent reactions, reduce the generation of impurities, and guarantee the purity and efficacy of Olaparib API.

II. Other Pharmaceutical-Related Applications

1. General Building Block for PARP Inhibitor Drug R&D: As a fluorinated cyano aromatic aldehyde derivative, it can be used for the structural modification and synthesis of other PARP inhibitors (such as AZD2461), adapting to the molecular skeleton construction and process optimization of this type of targeted anti-cancer drugs.
2. Raw Material for Heterocyclic Drug Synthesis: It can construct nitrogen-containing heterocycles such as quinoline, phthalazine and pyrazole through reactions like aldehyde condensation, cyano hydrolysis/cyclization and fluorine nucleophilic substitution, which are applied in the laboratory R&D and structural optimization of small-molecule drugs for anti-tumor, anti-infection, neurological diseases and other indications.
3. Structural Modification of Drug Molecules: As an aromatic ring side chain/linker fragment, its introduction into drug molecules can enhance target binding affinity, improve lipid-water partition coefficient and metabolic stability, and is widely used in the structural modification of anti-cancer and anti-inflammatory drugs.

III. General Organic Synthesis Applications

1. Building Block for Fluorinated Aromatic Compounds: With three highly reactive sites on the benzene ring—fluorine atom, aldehyde group (-CHO) and cyano group (-CN)—it can undergo various reactions such as reduction, oxidation, condensation, addition and cyclization. It is a general raw material for preparing various fluorinated aromatic fine chemicals, pharmaceutical intermediates and pesticide intermediates.
2. Derivatization Raw Material: It can be used as a core raw material for synthesizing downstream derivatives such as 3-cyano-4-fluorobenzyl bromide, further expanding its synthetic applications in fields such as functional materials and organic catalytic ligands.
3. Heterocyclic Compound Construction: Used for synthesizing nitrogen-containing heterocyclic compounds such as pyrazole, pyrimidine and isoquinoline, supporting basic research in organic synthetic chemistry and the construction of new drug molecular libraries.