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Noncovalent solid-phase organic synthesis
Noncovalent solid-phase organic synthesis or NC-SPOS is a form of Solid-phase synthesis where by the organic substrate is bonded to the solid phase not by a covalent bond but by other chemical interactions. This bond may consist of an induced dipole interaction between a hydrophobic matrix and a hydrophobic anchor. As long as the reaction medium is hydrophilic (polar) in nature the anchor will remain on the solid phase. Switching to a nonpolar solvent releases the organic substrate containing the anchor.
Additional recommended knowledge
In one experimental setup the hydrophobic matrix is RP silica gel (C18) and the anchor is acridone. Acridone is N-alkylated and the terminal alkene group is converted into an aldehyde by ozonolysis. This compound is bonded to RP silica gel and this system is subjected to a tandem sequence of organic reactions. The first reaction is a Barbier reaction with propargylic bromide in water (green chemistry) and the second reaction is a Sonogashira coupling. Substrates may vary in these sequences and in this way a chemical library of new compounds can be realized.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Noncovalent_solid-phase_organic_synthesis". A list of authors is available in Wikipedia.|