Conclusions Thus, in the attack of secondary amines on TNA, it is thought that the u complexes on the substitution pathway are formed in a very rapid equilibrium and are much longer lived than that from the primary amine discussed in the previous paper. However, the expected conversion to the substituted picramide product 4 does not occur. There is, instead, a reaction to produce the dimethoxy Meisenheimer complex 3. The difference ...
