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Carbon‐13 n.m.r. investigation on the nitrogen methylation of the mono‐ and diazanaphthalenes
Author(s) -
van de Weijer Peter,
Mohan Chandra,
van den Ham Dirk M. W.
Publication year - 1977
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270100137
Subject(s) - protonation , methylation , nitrogen , cinnoline , chemistry , nitrogen atom , carbon fibers , medicinal chemistry , organic chemistry , materials science , biochemistry , group (periodic table) , gene , ion , composite number , composite material
The 13 C n.m.r. spectra of the N ‐methylated mono‐ and diazanaphthalenes have been recorded and analysed. It has been shown that N ‐methylation as well as N ‐protonation in cinnoline occur predominantly at the β‐nitrogen atom. N ‐methylation and N ‐protonation show a similar effect on the 13 C chemical shifts.