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RESEARCH ARTICLE

Nano-Fe3O4-encapsulated silica particles bearing sulfonic acid groups as a magnetically separable catalyst for green synthesis of 1,1-diacetates

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Pages 79-84 | Received 15 Nov 2013, Accepted 21 Jan 2014, Published online: 01 Apr 2014

Figures & data

Table 1. Optimization of the model reaction.Footnotea

Table 2. Fe3O4@SiO2–SO3H-catalyzed synthesis of various acylals derivatives.

Figure 1. (a) TEM image of Fe3O4@SiO2–SO3H after 5 runs. (b) FTIR spectra of Fe3O4@SiO2–SO3H (A) fresh and (B) after 5 runs recycle.
Figure 1. (a) TEM image of Fe3O4@SiO2–SO3H after 5 runs. (b) FTIR spectra of Fe3O4@SiO2–SO3H (A) fresh and (B) after 5 runs recycle.
Figure 2. The XRD pattern of reused Fe3O4@SiO2–SO3H.
Figure 2. The XRD pattern of reused Fe3O4@SiO2–SO3H.
Scheme 1. The proposed mechanism.
Scheme 1. The proposed mechanism.

Table 3. Comparison of result using Fe3O4@SiO2–SO3H with results obtained by other published works for the synthesis of phenylmethylene diacetate.