418
L. M. Martínez-Prieto and P. W. N. M. van Leeuwen
12.2.2.2 Oxygen Donor Ligands
Roucoux and Monflier described the preparation of RuNPs in the presence of various
methylated cyclodextrins (Me-CDs) by reduction of RuCl 3 with NaBH 4 [44]. The
resulting NPs (between 1 and 2.5 nm) were employed as catalysts in the chemoselective hydrogenation of arene derivatives. Here, the Me-CDs have a multiple role:
(i) as stabilizer, (ii) as phase-transfer agent, because catalysis is performed in biphasic medium, and iii) as reactant host in the selective hydrogenation reactions. The
nature of the Me-CD [type (α, β, γ) and substitution degree] (Fig. 12.10) controls the
Fig. 12.10 Preparation of RuNPs in the presence of various methylated cyclodextrins. Reproduced
from Ref. [44] with permission from RSC
L. M. Martínez-Prieto and P. W. N. M. van Leeuwen
12.2.2.2 Oxygen Donor Ligands
Roucoux and Monflier described the preparation of RuNPs in the presence of various
methylated cyclodextrins (Me-CDs) by reduction of RuCl 3 with NaBH 4 [44]. The
resulting NPs (between 1 and 2.5 nm) were employed as catalysts in the chemoselective hydrogenation of arene derivatives. Here, the Me-CDs have a multiple role:
(i) as stabilizer, (ii) as phase-transfer agent, because catalysis is performed in biphasic medium, and iii) as reactant host in the selective hydrogenation reactions. The
nature of the Me-CD [type (α, β, γ) and substitution degree] (Fig. 12.10) controls the
Fig. 12.10 Preparation of RuNPs in the presence of various methylated cyclodextrins. Reproduced
from Ref. [44] with permission from RSC