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Synthesis of High-Load, Hybrid Silica-Immobilized Heterocyclic Benzyl Phosphate (Si-OHBP) and Triazolyl Phosphate (Si-OHTP) Alkylating Reagents.


ABSTRACT: The development of new ROMP-derived silica-immobilized heterocyclic phosphate reagents and their application in purification-free protocols is reported. Grafting of norbornenyl norbornenyl-functionalized (Nb-tagged) silica particles with functionalized Nb-tagged heterocyclic phosphate monomers efficiently yield high-load, hybrid silica-immobilized oligomeric heterobenzyl phosphates (Si-OHBP) and heterotriazolyl phosphates (Si-OHTP) as efficient alkylation agents. Applications of these reagents for the diversification of N-, O-, and S-nucleophilic species, for efficient heterobenzylation and hetero(triazolyl)methylation have been validated.

SUBMITTER: Faisal S 

PROVIDER: S-EPMC4943333 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature

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Synthesis of High-Load, Hybrid Silica-Immobilized Heterocyclic Benzyl Phosphate (Si-OHBP) and Triazolyl Phosphate (Si-OHTP) Alkylating Reagents.

Faisal Saqib S   Maity Pradip K PK   Zang Qin Q   Rolfe Alan A   Hanson Paul R PR  

ACS combinatorial science 20160614 7


The development of new ROMP-derived silica-immobilized heterocyclic phosphate reagents and their application in purification-free protocols is reported. Grafting of norbornenyl norbornenyl-functionalized (Nb-tagged) silica particles with functionalized Nb-tagged heterocyclic phosphate monomers efficiently yield high-load, hybrid silica-immobilized oligomeric heterobenzyl phosphates (Si-OHBP) and heterotriazolyl phosphates (Si-OHTP) as efficient alkylation agents. Applications of these reagents f  ...[more]

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