Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07F
ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
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9/00
Compounds containing elements of Groups 5 or 15 of the Periodic Table
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C07F9/547
Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
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C07F9/6564
having phosphorus atoms, with or without nitrogen, oxygen, sulfur, selenium or tellurium atoms, as ring hetero atoms
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C07F9/6581
having phosphorus and nitrogen atoms with or without oxygen or sulfur atoms, as ring hetero atoms
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C07F9/6584
having one phosphorus atom as ring hetero atom
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C07F9/65842
Cyclic amide derivatives of acids of phosphorus, in which one nitrogen atom belongs to the ring
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C07F9/65846
the phosphorus atom being part of a six-membered ring which may be condensed with another ring system
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