Table 1. Comparison of the Yields of Acylated Products in the Presence or Absence of K₂CO₃^a.

	with K2CO3 (3 equiv)			without base
product	catalyst (mol %)	time (h)	yield (%)	catalyst (mol %)	time (h)	yield (%)
2a	5	12	79	5	12	39
	10	12	87	10	12	53
				10	1	76
2b	5	12	70	10	1	75
2c	5	12	76	10	2	87
2e	5	12	73	10	1	84
4a	5	12	69	10	3	75
4b	5	12	70	10	3	85

^aYields are isolated yields.