Fig. 2: Substrate scope of the decarbonylation reaction.

General conditions: 1 (0.1 mmol), DBU (2 equiv.), t-BuOK (1.25 equiv.) in DMSO (1.5 mL), H2O (80 μL) at rt for 36 h under Ar; aWithout H2O. b48 h. cThe reaction was carried out on a 6.0 mmol scale under modified conditions (see Supplemental Information). dDechlorination product 2a was obtained. eNaOH (1.25 equiv) instead of t-BuOK, without H2O.