Immobilized piperazine on the surface of graphene oxide as a heterogeneous bifunctional acid-base catalyst for the multicomponent synthesis of 2-amino-3-cyano-4: H -chromenes

1. Khazaee, A.
2. Jahanshahi, R.
3. Sobhani, S.
4. Skibsted, J.
5. Sansano, J.M.