Chalcogen Attached Directly To The Five-membered Hetero Ring By Nonionic Bonding (e.g., 3-pyrrolidinols, Etc.) Patents (Class 548/541)
- And chalcogen bonded directly to a ring carbon of the five membered hetero ring which is not adjacent to the ring nitrogen (e.g., 2,4 pyrrolidinediones, etc.) (Class 548/544)
- And chalcogen bonded directly to the other ring carbon of the five-membered hetero ring which is adjacent to the ring nitrogen (e.g., succinimide, etc.) (Class 548/545)
- Nitrogen attached directly or indirectly to the five-membered hetero ring by acyclic nonionic bonding (Class 548/546)
- Chalcogen attached indirectly to the five-membered hetero ring by acyclic nonionic bonding (Class 548/547)
- Carbon to carbon unsaturation between ring members of the five-membered hetero ring (e.g., maleimide, etc.) (Class 548/548)
- Nitrogen attached directly or indirectly to the five-membered hetero ring by acyclic nonionic bonding (Class 548/550)
- Chalcogen attached indirectly to the five-membered hetero ring by acyclic nonionic bonding (Class 548/551)
- Processes of forming 2-pyrrolidone which is unsubstituted or alkyl or alkenyl substituted only (Class 548/552)
- Purification or recovery of 2-pyrrolidone which is unsubstituted or alkyl substituted only (Class 548/555)