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Description
TCI D4669 3,6-Dibromo-2,7-dihydroxynaphthalene is a difunctional aromatic intermediate built on a naphthalene core that carries hydroxy groups at the 2 and 7 positions and bromine atoms at the 3 and 6 positions. The compound belongs to the small molecule semiconductor building blocks category and is widely used in materials research laboratories as a starting framework for constructing larger conjugated molecules. Its substitution pattern differs from that of the 1,5-dibromo-2,6-dihydroxy isomer, giving researchers an alternative geometry to work with when they decide in which direction conjugation should be extended.
The property that makes this material attractive is the symmetric, side-by-side placement of the hydroxy groups and bromine atoms on the two halves of the naphthalene core. This arrangement is well suited to intramolecular cyclization to form fused naphthodifuran systems, a class of materials studied extensively as organic semiconductors. The hydroxy groups are also readily converted into ethers, esters, or triflates, so side chain length can be tuned to adjust solubility and packing behavior. The bromine atoms, in turn, open the way to palladium-catalyzed cross-coupling as well as metal-catalyzed polymerization. The naphthalene core contributes structural rigidity to the resulting systems.
In Indonesian laboratories this building block is typically handled in university and institutional materials chemistry groups working on organic semiconductors and conjugated polymers. It is used at the synthesis stage, where researchers derivatize the hydroxy groups and then carry the brominated intermediate through coupling steps toward a target molecule. Because it functions as an early-stage scaffold rather than a finished material, it is usually purchased in research quantities and consumed across a series of exploratory reactions.
Laboratory Applications
Naphthodifuran synthesis — the adjacent hydroxy and bromine pairs on each side of the core allow intramolecular cyclization into fused ring systems studied as organic semiconductors.
Palladium-catalyzed cross-coupling — the two bromine atoms serve as reliable reactive handles for building extended conjugated frameworks from a symmetric difunctional starting point.
Metal-catalyzed polymerization — the dibromo substitution makes this compound suitable as a monomer for growing conjugated polymer chains under metal catalysis.
Side chain engineering — converting the hydroxy groups to ethers, esters, or triflates lets researchers tune solubility and solid-state packing behavior of downstream materials.
Isomer comparison studies — its substitution pattern differs from the 1,5-dibromo-2,6-dihydroxy isomer, providing an alternative geometry when comparing directions of conjugation extension.
Specifications
Brand: TCI
CAS number: 96965-79-6
Category: Materials Science > Material Building Blocks > Small Molecule Semiconductor Building Blocks
Product code: TCI D4669
Pack sizes: available in standard TCI research-scale packaging; please confirm the pack size required
Storage: keep in the original tightly closed container, protected from light and moisture
Handling and Storage
Store the container tightly closed in a cool, dry, well-ventilated area away from direct sunlight and sources of ignition. Keep the material in its original amber or opaque supplier container, or transfer to a clean, dry glass vessel with a chemically compatible closure; brominated phenolic compounds are best protected from prolonged light and humidity exposure. Handle in a fume hood using nitrile gloves, safety glasses, and a laboratory coat, and avoid generating dust when weighing. Use clean spatulas to prevent cross-contamination, close containers immediately after use, and consult the manufacturer safety data sheet before first handling. Dispose of residues and contaminated materials through your institution's chemical waste stream.
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