Table 2. Pyrrole Reaction Optimization^a.

entry	deviation	yield of 2ab
1	none	70%
2	DMF (0.1 M)	55%
3	50 °Cc	56%
4	NHC 1c	24%

^a0.1 mmol scale.

^bIsolated yield.

^c16 h reaction time at 50 °C.