607355-72-6Relevant academic research and scientific papers
Nickel(o)-mediated [3+2+2] and [2+2+2+1] cyclization reactions of chromium Fischer carbene complexes and alkynes
Barluenga, Jose,Barrio, Pablo,Lopez, Luis A.,Tomas, Miguel,Garcia-Granda, Santiago,Alvarez-Rua, Carmen
, p. 3008 - 3011 (2003)
Dramatic changes in Fischer carbene reactivity occur in the presence of [Ni(cod)2]. Thus, instead of Doetz [3+2+1] benzannulation giving substituted phenols, alkenyl carbene complexes incorporate two equivalents of alkyne in a [3+2+2] cyclizati
Chromium(0)-rhodium(I) metal exchange: Synthesis and X-ray structure of new Fischer (NHC)carbene complexes of rhodium(I)
Barluenga, José,Vicente, Rubén,López, Luis A.,Tomás, Miguel
, p. 5654 - 5659 (2006)
An easy approach to Fischer (NHC)carbene complexes of rhodium(I) 3 from methoxy- and aminocarbene complexes of chromium 1 and (NHC)(cod)RhCl (2) is described. The process involves the transfer of the carbene unit and a CO ligand from chromium to rhodium.
Copper-catalyzed dimerization of chromium Fischer carbene complexes: Synthesis of dialkoxytrienes and their Nazarov-type cyclization to 2-alkoxy-2-cyclopentenones
Barluenga, José,Barrio, Pablo,Vicente, Rubén,López, Luis A.,Tomás, Miguel
, p. 3793 - 3799 (2007/10/03)
Fischer carbene complexes 1 underwent a clean ligand dimerization reaction yielding functionalized olefins and trienes 4 in the presence of copper (I) catalysts. If treated with trifluoroacetic acid (TFA), trienes 4c, d, f undergo a cyclization process (Nazarov reaction) which furnishes cyclopentenone derivatives 6c, d, 7c, d and 8 in good yields. Finally, the Fischer aminocarbene 9 efficiently cyclodimerizes to the substituted arene 10 in the presence of CuBr.
