Dipolar HCP materials as alternatives to DMF solvent for azide-based synthesis

Abstract

Hypercrosslinked polymers HCP-DMF and HCP-DMF-SO₃H containing abundant and flexible DMF moieties were designed and synthesized. Benefitting from the solvation microenvironment provided by the pseudo-DMF moities, the polar HCPs manifested outstanding performances in the conversions of NaN₃ to benzylic azides and 1,2,3-triazoles in EtOH (95%), respectively, avoiding the use of risky DMF and improving the separation processes of the products.