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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.50A [2011] >
IJC-A Vol.50A(09-10) [September-October 2011] >
| Title: | Heterogeneous Stille and Sonogashira cross-coupling reactions over palladium anchored mesoporous silica catalyst |
| Authors: | Bhunia, Susmita
Koner, Subratanath |
| Keywords: | Catalysts
Heterogeneous catalysts
Cross coupling reactions
Stille reaction
Sonogashira reaction
Mesoporous catalysts
Palladium
Silica |
| Issue Date: | Sep-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | A Pd-based
heterogeneous catalyst (Pd(II)-MCM-41) derived from post-synthesis modification
of mesoporous silica,
MCM-41, has been successfully employed in catalytic Stille and Sonogashira
cross-coupling reactions. The catalyst affords good yields in all
cross-coupling reactions. Notably, the catalyst is capable of activating less
reactive chlorobenzene with moderate yield in both the coupling reactions. The
reactions take place smoothly in air without any activating ligand. It is
observed that in the case of Stille reactions, the less expensive organotin
reagent, Ph3SnCl, can be used instead of the conventional expensive
reagent, Bu3SnPh. Both the organotin reagents exhibit comparable
reactivity in Stille reactions catalyzed by Pd(II)-MCM-41. The catalyst is
easily recoverable and reusable at least three times without significant loss
of catalytic activity. |
| Page(s): | 1380-1387 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Source: | IJC-A Vol.50A(09-10) [September-October 2011]
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