Studies of Vitamin K3 synthesis over Ti-containing mesoporous material

Synthesis of Fe 3 O 4 @SiO 2 @OSi(CH 2 ) 3 NHRN(CH 2 PPh 2 ) 2 PdCl 2 type nanocomposite complexes: Highly efficient and magnetically-recoverable catalysts in vitamin K 3 synthesis

“…Despite the decrease in activity in the last period, the average results of three catalytic cycles have indicated that catalytic synthesis of vitamin K 3 using Fe 3 O 4 @SiO 2 -supported-Pd(II) complexes are very efficient and the selective on comparison to the literature Florea et al, 2014;Kowalski et al, 2003;Anunziata et al, 2004Shimanskaya et al, 2014Yube;& Mae, 2005;Narayanan et al, 2002). It can be said that our synthesized Fe 3 O 4 @SiO 2 -supported-Pd(II) complexes can be tried for industrial production of vitamin K 3 .…”

“…Acetic acid joins into the oxidation mechanism together with catalysts by transporting oxygen to aromatic ring (Kowalski et al;Narayanan et al, 2002;Shimanskaya et al, 2014;Zalomaeva et al 2007;Florea et al, 2014 Phosphines-metal complexes (especially Pd(II) and Pt(II)) are known as efficient catalysts in oxidation reactions using peroxides Florea et al, 2014). Even though all the complexes show good activity, Fe 3 O 4 @L1-Pd(II) complex showed the best catalytic activity and the best selectivities compared with the literature Florea et al, 2014;Kowalski et al, 2003;Anunziata et al, 2004Shimanskaya et al, 2014Yube;& Mae, 2005;Narayanan et al, 2002). Selectivites reached to 60-65 % with 95-99 % conversions ( Figure 5, Table 1).…”

“…Selectivites reached to 60-65 % with 95-99 % conversions ( Figure 5, Table 1). These values are the best in the literature for the selective production of 2-methyl-1,4-naphthoquinone (vitamin K 3 ) from 2-methylnaphthalene Florea et al, 2014;Kowalski et al, 2003;Anunziata et al, 2004;Shimanskaya et al, 2014;Yube;& Mae, 2005;Narayanan et al, 2002).…”

Using the Response Surface Methodology to Optimize the Extraction of Silica and Alumina from Coal Fly Ash for the Synthesis of Zeolite Na-A

“…Fitting experimental data to generate response surface model, regression modeling techniques and optimization methods are usually combined into RSM. The statistical method of experimental design has the advantage of optimization of several processes [23][24][25][26][27] and of being less expensive and time-consuming than the classical method.…”

New routes to Vitamin K3

“…The development of cleaner, catalytic methods for the synthesis of menadione is therefore a challenging goal. Several catalytic procedures based on the oxidation of MN were reported (Table 1) [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In general, the selectivity is moderate due to formation of numerous side-products (Scheme 2), the main one being isomeric 6-methyl-1,4-naphthoquinone (6-MNQ).…”