Table 3.

Substrate scope of the enantioselective terpolymerization mediated by the (S,S,S,S,S)-1b/PPNCl catalyst system^*

^*The reactions were performed in a 20-mL flask at 25 °C. (S,S,S,S,S)-1b/PPNCl/rac-TBGE/meso-epoxide/anhydride/toluene = 1/2/400/200/400/400 (molar ratio), except for entries 2 and 3, and 0.5 × mol_(rac-TBGE) + mol_{(meso-epoxide)} = mol_(PA) (molar ratio).

^†(TBGE-alt-PA) linkage unit content in the terpolymers, determined by ¹H NMR spectroscopy.

^‡Determined using gel permeation chromatography in tetrahydrofuran, calibrated with polystyrene.

^§Measured by hydrolyzing the polymer and analyzing the diol resulting from the meso-epoxide by chiral GC analysis, or by derivatizing the resulting diol using benzoyl chloride, and then determining the ee via chiral GC/HPLC.

^¶Measured by hydrolyzing the polymer and analyzing the diol resulting from rac-TBGE by chiral GC analysis.

^#Determined by differential scanning calorimetry analysis.

^||rac-TBGE/CHO = 18/1 (molar ratio).

^**rac-TBGE/CHO = 2/9 (molar ratio).