Synthesis, Characterization, and Catalytic Activity of Pd(II) Salen-Functionalized Mesoporous Silica

Table 2

Optimization of reaction conditions of C-(tetra-O-acetyl--D-galactopyranosyl)allene (1) with aniline (2a).

Entry	Catalyst	(%); 3a
1	Pd(OAc)2	30
2	SiO2@ imineSA-Pd-II	17
3	SiO2@ imineSA-Pd-I	34
4	SiO2@ imineSB-Pd-II	16
5	SiO2@ imineNA-Pd-II	50
6	SiO2@ imineNB-Pd-II	60

All reactions were carried out with conditions: C-(tetra-O-acetyl--D-galactopyranosyl)allene (1) (0.27 mmol) and aniline (0.81 mmol) in 0.5 mL of solvent for 48 h. Isolated yields.