Sol-gel entrapped Cu in a silica matrix: An efficient heterogeneous nanocatalyst for Huisgen and Ullmann intramolecular coupling reactions

1. Diz, P.
2. Pernas, P.
3. El Maatougui, A.
4. Tubio, C.R.
5. Azuaje, J.
6. Sotelo, E.
7. Guitián, F.
8. Gil, A.
9. Coelho, A.