Fig. 3

Transesterification of DPHFIPA. a Scheme for DPBA via the PPM of DPHFIPA. Conditions [HFIPA unit]/[butanol]/[DBU] = 1/100/1.1 (molar ratio) in THF at 50 °C for 12 h. b ¹⁹F NMR spectra of DPHFIPA and the diluted reaction mixture after the PPM (470 MHz, 300 K, Acetone-d₆). c ¹H NMR spectrum of DPBA (500 MHz, 300 K, CDCl₃)