| abstract |
Halogenated derivatives of 4 H , 5 H -thieno [3,2- b : 4,5- b ' ] dipi- Roles and corresponding procedures and uses.n n n The present invention develops the synthesis of 2,7-dihalo-4 H , 5 H -thieno [3,2- b : 4,5- b ' ] diprole systems of formula general (1), where R can be (C 1-5) alkyl, benzyl or substituted benzyl; G can be hydrogen or trimethylsilylethoxymethyl (SEM) and X can be chlorine, bromine or iodine. The use of the compounds (1) is described as a background of substituted 2,2'-dipyroles 4,4'-diaryl and substituted precursors of positions 2,7,12,17 by alkenyl, aryl or heteroaryl groups. |