Piperazines (i.e., Fully Hydrogenated 1,4-diazines) Patents (Class 544/358)
- Six-membered ring consisting of one nitrogen and five carbons (e.g., pyridine, etc.) (Class 544/360)
- The additional six-membered hetero ring is one of the cyclos in a polycyclo ring system (Class 544/361)
- At least three hetero rings containing (Class 544/364)
- Having -C(=X)-, wherein X is chalcogen, bonded directly to ring carbon of the additional six-membered hetero ring (e.g., nicotinic acid, etc.) (Class 544/365)
- Five-membered hetero ring having two or more ring hetero atoms of which at least one is nitrogen (Class 544/366)
- Five-membered hetero ring consisting of one nitrogen and four carbons (Class 544/372)
- Ring chalcogen in the additional hetero ring (Class 544/374)
- Plural -C(=X)- groups bonded directly to the piperazine ring (Class 544/387)
- The -C(=X)- is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens (Class 544/389)
- Halogen or acyclic nitrogen bonded directly to the -C(=X)- group (Class 544/390)
- Carbocyclic ring containing (Class 544/391)
- Acyclic nitrogen bonded directly to a -C(=X)- group, wherein X is chalcogen (Class 544/393)
- The other ring nitrogen has a substituent which includes chalcogen single bonded to acyclic carbon (Class 544/394)
- The other ring nitrogen is unsubstituted or alkyl substituted only, or salt thereof (Class 544/395)