N-Nitrosodecahydroquinolines 3-Nitrogen-15 Nuclear Magnetic Resonance Spectra
摘要:
Abstract15N Chemical shifts of N‐nitroso‐trans‐decahydroquinoline, N‐nitroso‐cis‐decahydroquinoline, of 12 methyl‐or t‐butyl‐substituted N‐nitrosodecahydroquinolines and of N‐nitroso‐trans‐syn‐trans‐perhydroacridine are reported. Shift effects for N‐nitrosation were calculated by comparison with the parent amines. Shift effects for ring substitution, obtained by comparison with the data of N‐nitrosopiperidine, are of similar direction and magnitude as in the parent amines for the ring nitrogens (N‐1). Methyl substitution nearly always causes deshielding for the nitroso nitrogens (N‐2), with a very large deshielding if the planarity of the (C‐α)2NNO region is disturbed.