. Author manuscript; available in PMC: 2011 Dec 22.

Published in final edited form as: Tetrahedron Lett. 2010 Dec 22;51(51):6748–6752. doi: 10.1016/j.tetlet.2010.10.087

Table 1.

Effect of irradiation time on benzyl 3,5-bis(benzloxy)-4-bromobenzoate (1)

Entry^a	Time	1:3:4^b	Yield of 3^c
1	10 min × 2	0:1:trace	45
2	10 min × 3	0:1:trace	49
3	15 min × 2	0:1:trace	48
4	15 min	11:50:1	n/a
5	20 min	0:1:trace	57
6	30 min	0:1:trace	57
7	45 min	0:1:trace	56
8	60 min	0:1:trace	56

9 mol % PdCl₂(dppf)CH₂Cl₂, THF:H₂O (10:1) at 0.051 M, 5 equiv of 2, 3 equiv Cs₂CO₃, 150 °C.

Determined by ¹H NMR integration of the crude mixture.

Isolated yield.