Table 3. Substrate Scope of Vicinal Diols and Propargylic Alcohols^a,h.

^aUnless otherwise specified, all of the reactions were performed under the following conditions: 1, 2 mmol; 2, 2 mmol; Ag₂CO₃, 27.6 mg, 0.1 mmol; L6, 115.7 mg, 0.2 mmol; CO₂, 1.0 MPa; CH₃CN, 2 mL; 80 °C; 12 h.

^bIsolated yield.

^c1H NMR yield.

^dUsing dimethylformamide as solvent.

^e2a, 336.4 mg, 4 mmol.

^f18 h.

^g24 h.

^hNote: To avoid loss of the products during the solvent removal under vacuum, NMR yield was given.