Add time:08/09/2019         Source:sciencedirect.com

A series of phosphonate-containing compounds based on dibenzo[d,f][1,3,2]dioxaphosphepine 6-oxide (BPPO) is presented. BPPO is synthesized by a three–component condensation and is added to activated alkenes with systematically varied structure via phospha-Michael addition. Acrylates, α,β-unsaturated carboxylic acid diesters and benzoquinone are used as activated alkenes. The new compounds are characterized by 1H, 13C and 31P NMR spectroscopy. The as-prepared phosphonates are envisioned to have flame retardant properties.

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