Table 2. Reaction Time and Yield of the Products 5a–j.

entry	reaction time (min)	isolated yield (%)
5a	20	92.35
5b	22	90.42
5c	15	95.28
5d	22	89.41
5e	15	96.53
5f	25	85.17
5g	20	90.34
5h	25	83.76
5i	15	93.89
5j	22	85.06