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

Molnár Á.. Papp A. Synlett  2006,  3130 

<P>Some important information was missing from Table 6. The complete Table 6 follows:</P>

<TD VALIGN="TOP"> Entry </TD><TD VALIGN="TOP"> Catalyst </TD><TD VALIGN="TOP"> Run 1 </TD><TD VALIGN="TOP"> Run 2 </TD><TD VALIGN="TOP"> Run 3 </TD><TD VALIGN="TOP"> 1
2 </TD><TD VALIGN="TOP"> Pd-montm1^a
Pd-montm2^a </TD><TD VALIGN="TOP"> 77
89 </TD><TD VALIGN="TOP"> 65
77 </TD><TD VALIGN="TOP"> 55
64 </TD><TD VALIGN="TOP"> 3
4 </TD><TD VALIGN="TOP"> Pd-montm1^b
Pd-montm2^b </TD><TD VALIGN="TOP"> 71
78 </TD><TD VALIGN="TOP"> 51
55 </TD><TD VALIGN="TOP"> 16
15 </TD><TD VALIGN="TOP"> 5
6 </TD><TD VALIGN="TOP"> Pd-montm1^b,c
Pd-montm2^b,c </TD><TD VALIGN="TOP"> 55
59 </TD><TD VALIGN="TOP"> 46
61 </TD><TD VALIGN="TOP"> 22
55 </TD><TD COLSPAN="20">

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</TD></TR><TR><TD VALIGN="TOP" COLSPAN="5"> ^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
</TD>

Table 6 Catalyst Recycling Experiments with Coupling of Bromobenzene and Styrene