. Author manuscript; available in PMC: 2009 Jun 8.

Published in final edited form as: J Am Chem Soc. 2008 Feb 2;130(8):2493–2500. doi: 10.1021/ja0748985

Table 6.

Determination of catalyst loading.

Entry	Solvent	Conc.^a	Temp (°C)	Time (h)	Yield (%)^b
1	THF	0.1	165	120	62
2	dioxane	0.1	165	120	82
3	dioxane	0.3	165	72	100
4	dioxane	0.3	165	48	90^c
5	dioxane	0.3	175	24	90^c

Concentration of benzimidazole.

Yield determined by GC with dodecane as an internal standard unless otherwise noted.

Isolated yield of pure product.