... Tetrahedron Letters. ... R134a, 9.10 ± 0.48, 11, 95, 44, 556 ± 14.2, 50, 99, >200. ... Yields and ee for each reaction are recorded after 24 h. Conditions (5 mL total volume): 10U PFL, 2.0 mmol rac-5, 2.5 mmol 3; 3U PS-CII, 0.5 mmol rac-5, 5 mmol 3. a Yields too low to be measured. ...