Sequential mono-N-arylation of piperazine nitrogens. Part 1: A simplified method and its application to the preparation of a key N, N′-biaryl piperazine antifungal …
A simple sequential N-arylation of piperazine without the use of a protecting group, catalyst, specialized equipment or a large excess of piperazine, and its application towards the preparation of the key differentially N, N′-biarylated piperazine antifungal intermediate N-(4- hydroxyphenyl)-N′-(4-aminophenyl) piperazine, 6, is described.