Table 1. Reaction Optimization Conditions.

entry	equiv 14 (x)	cosolvent, (vol)	time (h)	temp. (°C)	conversion (area %)a
1	1.2	(0)	2	100	63
2	1.2	MeCN, (10)	19	22	88
3	1.2	MeCN, (10)	3	40	90
4	1.2	MeOH, (10)	3	40	84
5	1.2	DMSO, (10)	3	40	87
6	1.2	MeTHF, (10)	3	40	79
7	1.2	DCM, (10)	3	40	77
8	1.2	H2O, (10)b	3	40	66
9	1.05	MeCN, (5)	3	35	90
9b			28	35	89
10	1.05	MeCN, (5)	3	35	90 (80)c

^aUPLC-UV percent area at 269 nm.

^bTotal water was 20 vol.

^cIsolated yield.