82043-98-9 Usage
Derivative of
Pyrazinone (a six-membered heterocyclic ring containing nitrogen and oxygen atoms)
Physical state
Colorless solid
Solubility
Sparingly soluble in water
Potential applications
Pharmaceutical and chemical industries
Structural features
Unique and interesting for further research and development
Check Digit Verification of cas no
The CAS Registry Mumber 82043-98-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,0,4 and 3 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 82043-98:
(7*8)+(6*2)+(5*0)+(4*4)+(3*3)+(2*9)+(1*8)=119
119 % 10 = 9
So 82043-98-9 is a valid CAS Registry Number.
82043-98-9Relevant articles and documents
A Photochemical Ring Contraction of an Imino Lactam
Kleyer, Don L.,Koch, Tad H.
, p. 3145 - 3148 (2007/10/02)
The photochemical rearrangement of three tetrahydro-2-pyrazinones in aqueous medium to imidazol-5-ones is described. 1,2,5,6-Tetrahydro-3,5,5-trimethyl-2-pyrazinone (4) gives 1,2,2,4-tetramethyl-3-imidazolin-5-one (7), 1,2,5,6-tetrahydro-3,6,6-trimethyl-2-pyrazinone (5) gives 4-methyl-5-imidazolidinone (9), and 1,2,5,6-tetrahydro-1,3,5,5-tetramethyl-2-pyrazinone (6) gives 1,4-dimethyl-5-imidazolidinone (8).A mechanism involving enediimine and isoimidazole intermediates is proposed in analogy with the mechanism for rearrangement of 5,6-dihydropyrazines to imidazoles.
