Boron Asymmetry in a BODIPY Derivative
Organic Letters2010Vol. 12(8), pp. 1672–1675
Citations Over TimeTop 10% of 2010 papers
Abstract
A boradiazaindacene (BODIPY) fluorophore with a chirality held on the central boron has been synthesized and the racemate resolved. Dissymetrization of the BODIPY core was obtained by oxidation of the 3-methyl group to the corresponding carboxaldehyde. A hydrogen bond between the aldehyde proton and the fluorine on the boron atom was evidenced by both (1)H NMR and X-ray diffraction. Chiral high-performance liquid chromatography as well as circular dichroism confirm the persistence of both enantiomers.
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