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Organic Building Blocks

Other Organic Building Blocks

Phosphonium salts, phosphonates, metal complexes, polysaccharides and miscellaneous intermediates that do not fit a single functional group class.
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Some useful compounds refuse to sit in one functional group, and this sub-category gathers them. It holds Wittig reagents and phosphonium salts, bisphosphonates, polysaccharides, protected chiral side chains and metal complexes used as reagents. Examples include (Carbethoxymethylene)triphenylphosphorane, (Bromomethyl)triphenylphosphonium bromide, (1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt (etidronate), (+)-Arabinogalactan and (Acetylacetonato)dicarbonylrhodium(I).

The range also includes statin side-chain intermediates such as the protected aminoethyl dioxane acetate used in atorvastatin synthesis. Because the items are so varied, check each listing for storage and handling notes. Stabilised ylides are air stable, phosphonium salts are hygroscopic, and rhodium carbonyl complexes need cold, inert storage.

Products ship in sealed containers suited to each compound, from gram packs to larger quantities where demand exists. Each lot comes with a COA and SDS. If you cannot find a compound by browsing, search by name, CAS number, formula or ZX catalogue number, as it may be listed here.

Other Organic Building Blocks: questions buyers ask

What is a stabilised Wittig ylide?
A stabilised ylide, such as (carbethoxymethylene)triphenylphosphorane, carries an electron-withdrawing group next to the carbanion. This makes it air stable and easy to handle, and it reacts with aldehydes to give mainly E-alkenes. Unstabilised ylides are more reactive, must be made in situ and tend to give Z-alkenes.
What is etidronate tetrasodium used for?
Etidronate is a bisphosphonate that binds metal ions strongly. Its sodium salts are used as scale inhibitors in water treatment, as chelating agents in detergents and cosmetics, and in research on bone mineral binding. The tetrasodium salt dissolves readily in water to give an alkaline solution.
How should rhodium carbonyl complexes be stored?
Store (acetylacetonato)dicarbonylrhodium(I) cold, in the dark and under inert gas. It slowly loses carbon monoxide and decomposes in air and light. Handle it in a fume cupboard, as carbonyl release is possible. It is used as a precursor for hydroformylation catalysts and in organometallic research.

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