Selective Fmoc and Cbz protection of aromatic amino group in the presence of similar aliphatic function in liquid CO2.

[Display omitted] The selective protection of an aromatic amino group in the presence of aliphatic amino group in diamines by the action of FmocCl or CbzCl using liquid CO 2 as the solvent has been proposed. The developed method is preparative, does not require complex purification of the product, and meets the principles of green chemistry. [ABSTRACT FROM AUTHOR]