Table 1.

Kinetic data for the chemical hydrolysis of the compounds (9a–d).

Compound	pH	Kobs (min−1)	t1/2(min)
9a	1.2	1.3818 × 10−3	501.51
	7.4	0.4606 × 10−3	1504.55
9b	1.2	1.3818 × 10−3	501.51
	7.4	0.4606 × 10−3	1504.55
9c	1.2	1.38 × 10−3	501.17
	7.4	1.38 × 10−3	501.17
9d	1.2	4.3757 × 10−3	158.37
	7.4	2.07 × 10−3	334.78