69658-91-9Relevant academic research and scientific papers
Copper(II)-catalyzed oxidative N-nitrosation of secondary and tertiary amines with nitromethane under an oxygen atmosphere
Sakai, Norio,Sasaki, Minoru,Ogiwara, Yohei
supporting information, p. 11638 - 11641 (2015/07/15)
The combination of a catalytic amount of Cu(OTf)2 and less than a stoichiometric amount of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) under an O2 atmosphere effectively promoted the N-nitrosation of both secondary aromatic/aliphatic amines and tertiary aromatic amines with nitromethane (CH3NO2) leading to the preparation of N-nitrosamine derivatives.
Reactions of N-Heteroaromatic Bases with Nitrous Acid. Part 7. Kinetics of the Nitrosation of the Secondary and of the Daizotisation of Primary β-Aminopyridines
Kalatzis, Evangelos,Papadopoulos, Panayiotis
, p. 248 - 255 (2007/10/02)
The nitrosation of 3-methylaminopyridine and 3-methylaminopyridine 1-oxide and the diazotisation of 3-amino-, 3-amino-2-chloro-, and 3-amino-6-methoxy-pyridine in 0.002-0.50M-perchloric acid are first-order in both the amine and nitrous acid.The rate coefficients of these reactions increase in the with an increase in the concentration perchloric acid and of sodium perchlorate.In perchloric acid solutions whose ionic strength is maintained constant by the addition of sodium perchlorate the rate coefficients of the nitrosation of 3-methylaminopyridine and of the diazotisation of 3-aminopyridine show only a rectilinear dependence on the +> of the medium.The nitrosation of 3-methylaminopyridine and the diazotisation of 3-amino, and 3-amino-6-methoxy-pyridine proceed mainly by the interaction of the nitrous acidium ion with the monoprotonated form of these amines whilst the nitrosation of 3-methylaminopyridine 1-oxide and diazotisation of 3-amino-2-chloropyridine proceed by the simultaneous interaction of the nitrous acidium ion with the protonated and the free form of both amines.The nitrosation and diazotisation of the free β-aminopyridines involve an initial interaction between the nitrous acidium ion and the heteroaromatic nucleus whilst the nitrosation and diazotisation of the monoprotonated β-aminopyridines proceed by direct interaction between the nitrous acidium ion and the amino group.These results are contrary to those of the nitrosation and diazotisation of the free and the protonated aromatic amines.Furthermore the nitrous acidium iom seems to show a distinct discrimination in its reaction with the free β-aminopyridines as is evident from a rectilinear relationship between the rate coefficients of their nitrosation and diazotisation and their Ka values.The similarity between the nitrosation and diazotisation results show that the formation of the nitrosamines is the rate-determining stage of the diazotisation of the β-aminopyridines in the acid range examined. pKa Values are recorded.
