Heterogenized Homogeneous Catalyst. 7. Comparisons of Thermal Oxidation and Heterogenized Homogeneous Co- and Mn-Type Resin Catalyzed Oxidation of Propionaldehyde

Sulfoxidation on a SiO2-supported Ru complex using O2/aldehyde system

“…16,54,88 Although the autoxidation of aldehydes occurs, the rate of sulfoxidation often increases with the use of metal catalysts. [89][90][91][92] In our catalytic system under the present reaction conditions, oxidation of MPS was negligible for a significant time in the absence of the Ru complex (Table 2). The supported Ru complex (D) significantly contributed to the acceleration of the MPS sulfoxidation rate.…”

Epoxidation of Oleic Acid in the Presence of Benzaldehyde Using Cobalt(II) Tetraphenylporphyrin as Catalyst

“…However, methods to decrease the amount of byproduct and to improve the stability of organic peracids simultaneously are seldom discussed. Recently, several investigations reported that high yields of organic peracids could be obtained using a heterogenized homogeneous metal ion on resin as catalyst (Chou and Lee, 1985;Hwang and Chou, 1987;Kuo and Chou, 1987;Chou et al, 1990;Yeh, 1992a,b, Chen andChou, 1994). The immobilized metal ions by other supports are seldom mentioned.…”

“…The oxidation of aldehyde is On the basis of eqs 1 and 2, the free radical RC • O can be generated. According to the reports (Chou and Lee, 1985;Chen and Chou, 1994), the RC • O free radicals react with O 2 to form the peroxy free radical RCO 3…”