DIRECT FORMYLATION OF 9,9′-SPIROBIFLUORENE: 2-CARBOXALDEHYDE-9,9′-SPIROBIFLUORENE AND 2,2′-DICARBOXALDEHYDE-9,9′-SPIROBIFLUORENE

Abstract

The one-step formylations, using CH₃OCHCl₂/TiCl₄ in CH₂Cl₂, of 9,9′-spirobifluorene to obtain 2-carboxaldehyde-9,9′-spirobifluorene and 2,2′-dicarboxaldehyde-9,9′-spirobifluorene in moderate to good yields are described. Previous works dealt with four-steps synthesis.

ACKNOWLEDGMENTS

The authors thank Murst (Italy) for financial support, project “Electrocatalysis and Electrosynthesis,” and Prof. L. Rampazzo for useful discussions.