Reference

Vibrational spectrum of 2-aminopyrazine

Vibrational spectrum of 2-aminopyrazine. Kalkar, Arun Kumar; Ars, Comakshi C. (Dep. Chem. Technol., Univ. Bombay, Bombay 400 019, India). Bull. Chem. Soc. Jpn., 59(10), 3223-8 (English) 1986. CODEN: BCSJA8. ISSN: 0009-2673. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) IR and polarized laser Raman spectra of the title compd. in the solid phase and in the soln. phase in different solvents have been obtained within the spectral region between 4000 and 200 cm-1 and analyzed for the purpose of vibrational assignments. The impact of intermol. 1333-74-0 and 5049-61-6 which are cas registry numbers of substances are two of reagents here. hydrogen bonding on amino group frequencies has been discussed in length. The fundamentals arising out of arom. nucleus in particular various assignments are consistent with predicted spectral changes due to the presence of strong electron-activating amino group resulting in considerable perturbation of the vibrational levels of parent mol. pyrazine. .

Studies on pyrazines

Studies on pyrazines. 11. A novel formation of 2-aminopyrazine from the reaction of pyrazine 1-oxide with phosphoryl chloride. Sato, Nobuhiro; Kobayashi, Michio (Dep. Chem., Yokohama City Univ., Yokohama 236, Japan). Bull. Chem. Soc. Jpn., 57(10), 3015-16 (English) 1984. CODEN: BCSJA8. ISSN: 0009-2673.Some chemicals with cas registry numbers like 5049-61-6 are also used. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) The reaction of pyrazine 1-oxide (I) with POCl3, gave a 49% yield of 2-chloropyrazine and a small amt. of 2-aminopyrazine (II). The precursor of aminopyrazine with elucidated to be a 1-(2-pyrazinyl)-pyrazinium salt from the 1H-NMR spectrum of the reaction mixt. prior to hydrolysis. The orientation of substitution in the formation of the salt was detd. by reaction of deuterium labeled pyrazine N-oxides with POCl3. .