A síntese de corantes macrocíclicos poliazometínicos de 20 membros, poliazometina 3a e 3b, a partir de 4,4'-di-hidroxibifenil-3,3'-di-carbaldeído (2a) e 5,5'-diamino-4,4'-di-hidroxibifenil-3,3'-di-carbaldeído (2b) e de pigmentos macrocíclicos poliazometínicos 4 e 5, a partir de 3a é descrita.The synthesis of 20-membered macrocyclic polyazomethine dyes 3a and 3b from 4,4'-dihydroxybiphenyl-3,3'-dicarbaldehyde (2a) and 5,5'-diamino-4,4'-dihydroxybiphenyl-3,3'-dicarbaldehyde (2b) and macrocyclic polyazomethine pigments 4 and 5 from 3a is described.
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