In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1121-89-7, name is Piperidine-2,6-dione, introducing its new discovery. SDS of cas: 1121-89-7
Bicyclic N-bridgehead lactams 2 and 3 are obtained by reacting the anions of succinimide and glutarimide with the cyclopropylphosphonium salt 1.Starting from 2 a diastereoselective synthesis of (+/-)-isoretronecanol (7) is achieved.The adducts 10, which are obtained from monothioimide anions and 1, do not cyclize regioselectively.Dehydrogenation of 2 using N-bromosuccinimide yields the 5,6-dihydropyrrolizine 11; however, reaction with lead tetraacetate gives the isomer 12.Succinimide reacts with the cyclopropylphosphonium salt 13 to give the pyrrolizidine 14.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 1121-89-7 is helpful to your research. SDS of cas: 1121-89-7
Reference：
Piperidine – Wikipedia,
Piperidine | C5H1478N – PubChem