Solid-phase synthesis of 2-amino-3-chloro-5- and 8-nitro-1,4-naphthoquinones: a new and general colorimetric test for resin-bound amines

Resin-bound amines react with quinone 3 to give red beads; cleavage from the primary amine resins RAM, PAL, and MBHA and from secondary amines derived from FDMP and Wang, affords the title compounds in high yields and purities.