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Beilstein J. Org. Chem. 2010, 6, 709–712, doi:10.3762/bjoc.6.82
Graphical Abstract
Figure 1: Representative complexes of N-heterocyclic carbenes and boranes (NHC–boranes).
Figure 2: Bertrand’s amino anthracenyl carbene trifluoroborane complex.
Scheme 1: Synthesis of stable CAAC–BF3 complexes 3a and 3b and in situ generation of CAAC–BH3 complex 4a.
Figure 3: X-Ray crystal structures of CAAC–BF3 complexes 3a (top) and 3b (bottom).
Beilstein J. Org. Chem. 2008, 4, No. 36, doi:10.3762/bjoc.4.36
Figure 1: Calix[4]arene in cone conformation.
Scheme 1: Preparation of 3a and 3b.
Scheme 2: Preparation of 4 and 5.
Scheme 3: Preparation of 6.
Scheme 4: Preparation of 8 and 9.
Figure 2: Full (top), top (bottom left)a, and side (bottom right)a views of 5; afluorous chains omitted for c...