Efficient Heterogeneous Palladium-Montmorillonite Catalysts for Heck Coupling of Aryl Bromides and Chlorides

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Synlett 2006(19): 3368-3368
DOI: 10.1055/s-2005-956470

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Publication Date:
23 November 2006 (online)

Some important information was missing from Table 6. The complete Table 6 follows:

*Table 6* Catalyst Recycling Experiments with Coupling of Bromobenzene and Styrene
Entry	Catalyst	Run 1	Run 2	Run 3
1 2	Pd-montm1^a Pd-montm2^a	77 89	65 77	55 64
3 4	Pd-montm1^b Pd-montm2^b	71 78	51 55	16 15
5 6	Pd-montm1^b,c Pd-montm2^b,c	55 59	46 61	22 55

^a Reaction conditions: alkene (1.5 equiv), Na₂CO₃ (1.2 equiv), catalyst (0.3 mol%), 150 °C, 3 h. ^b Reaction conditions: alkene (1.5 equiv), Et₃N (1 equiv), Na₂CO₃ (0.5 equiv), catalyst (0.3 mol%), 160 °C, 3 h. ^c Catalysts reduced with hydrogen.¹⁶