Synthesis of polyesters containing coumarin dimer components by photopolymerization of 7,7′-coumarinyl polymethylene dicarboxylates

Polyethers containing coumarin dimer com

Polyethers containing coumarin dimer components in the main chain. I. Synthesis by photopolymerization of 7,7′-(polymethylenedioxy) dicoumarins

✍ Yun Chen; Chuen-Sheng Jean 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 199 KB 👁 2 views

Eight 7,7-(polymethylenedioxy) dicoumarins were successfully synthesized by solution condensation of 7-hydroxycoumarin (umbelliferone) or 7-hydroxy-4methylcoumarin (4-methylumbelliferone) with various dibromoalkanes. Upon benzophenone-sensitized irradiation with 350 nm light in dichloromethane, the