C07D HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
Description
Heterocyclic compounds containing one or more atoms other than carbon in a ring structure, including nitrogen, oxygen, sulfur, phosphorus, and other heteroatoms. This subclass encompasses diverse ring systems ranging from simple five- and six-membered rings (such as pyrroles, furans, thiophenes, and pyridines) to complex polycyclic and fused ring structures. Compounds are classified by ring size, number of heteroatoms, and their position within the ring system, with separate divisions addressing specific chemical properties and synthesis routes. Adjacent subclass C07C covers acyclic and carbocyclic organic compounds, while C07B addresses general methods of organic synthesis applicable across compound classes.
Filing statistics
CPC subclass C07D recorded 539,185 patent applications worldwide between 2013 and 2023. Annual filings declined from 46,693 in 2013 to 39,043 in 2023 (-16%), peaking at 52,900 applications in 2018. The most active applicants in class C07 are ROCHE (12,683 applications), NOVARTIS (10,775 applications) and CHINESE ACADEMY OF SCIENCES (10,619 applications).
Source: EPO PATSTAT, worldwide filings
109 direct subcodes
Child Classifications
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- C07D 201/00 Preparation, separation, purification or stabilisation of unsubstituted lactams
- C07D 203/00 Heterocyclic compounds containing three-membered rings with one nitrogen atom as the only ring hetero atom
- C07D 205/00 Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom
- C07D 207/00 Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D 209/00 Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D 211/00 Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D 213/00 Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D 215/00 Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems
- C07D 217/00 Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems
- C07D 219/00 Heterocyclic compounds containing acridine or hydrogenated acridine ring systems
- C07D 221/00 Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00
- C07D 223/00 Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom
- C07D 225/00 Heterocyclic compounds containing rings of more than seven members having one nitrogen atom as the only ring hetero atom
- C07D 227/00 Heterocyclic compounds containing rings having one nitrogen atom as the only ring hetero atom, according to more than one of groups C07D203/00 - C07D225/00
- C07D 229/00 Heterocyclic compounds containing rings of less than five members having two nitrogen atoms as the only ring hetero atoms
- C07D 231/00 Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
- C07D 233/00 Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D 235/00 Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings
- C07D 237/00 Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings
- C07D 239/00 Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
Top Applicants
Top 10 applicants by patent filingsfor class C07, 2013–2023, worldwide · Source: EPO PATSTAT
- ROCHE CH 12,683
- NOVARTIS CH 10,775
- CHINESE ACADEMY OF SCIENCES 10,619
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 9,511
- REGENERON PHARMACEUTICALS US 8,426
- BRISTOL-MYERS SQUIBB COMPANY US 7,979
- LG CHEM KR 7,978
- HARVARD UNIVERSITY US 7,706
- UNIVERSITY OF CALIFORNIA US 7,455
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 7,219