Full N,N-Methylation of 4,4′-Methylenedianiline with Dimethyl Carbonate: A Feasible Access to 4,4′-Methylene bis(N,N-Dimethylaniline)

Table 2

The molecular weights and structures of by-products 1, 2, and 3.

Compound	Molecular weights	Identified structures	Possible configurations
1	212
2	226
3	240