2,2',7,7'-tetrabromo-9,9'-spirobifluorene → 9,9'-Spirobi[fluorene]-2,2'-dicarboxylic acid

Participants

Reaction Steps

i-k) 9,9′-Spirobifluorene-2,2′,7,7′-tetracarboxylic acid can be prepared in an analogous way from 2,2′,7,7′-tetrabromo-9,9′-spirobifluorene; likewise, 9,9′-spirobifluorene-2,2′,7-tricarboxylic acid can be prepared from 2,2′,7-tribromo-9,9′-spirobifluorene and 9,9′-spirobifluorene-2,2′,4,4′,7,7′-hexacarboxylic acid can be prepared from 2,2′,4,4′,7,7′-hexabromo-9,9′-spirobifluorene by analogous methods.

Provenance & Evidence