Table 2. Effect of Changing the Identity of the β-Ketoester.


Reaction performed using 1 equiv of 4a, 1.05 equiv of 9, and 3 equiv of pyridine in CHCl3 at 50 °C.
Isolated yield of 6 after silica gel chromatography; only product obtained.


Reaction performed using 1 equiv of 4a, 1.05 equiv of 9, and 3 equiv of pyridine in CHCl3 at 50 °C.
Isolated yield of 6 after silica gel chromatography; only product obtained.