First, we evaluated the oxidation of benzoin using different catalysts under an open-air system with the solvent DMSO, as shown in the following Figure . The Ti (OtBu)4 has been used as a homogenous Lewis acid catalyst and was evaluated in the catalyzed phosphorylation of alcohols with pyrophosphates. The Ti (OtBu)4 was found to be an effective catalyst in the phosphorylation of both primary and secondary alcohols while 1.5 equiv. of N, N-Diisopropylethylamine, or Hünigs base was used as an acid scavenger. The Sn(II)-containing Imidazolium-based Ionic Liquid [BBIM]Br-SnCl2 has been also used as a heterogenous catalyst to oxidize a number of alcohols using 1.3 equiv. of hydrogen peroxide as an oxidant. Recently, both Ti(OBu)4 and Sn(Oct)2 were used together as an efficient catalyst system for high molecular weight poly(butylene succinate) synthesis. It was found that the combination complex of Ti and Sn catalysts could promote both esterification and trans-esterification reactions via a modified metal oxide complex. However, until now, there has been no report on the oxidation of benzoin using Ti(Ot Bu)4 and Sn(Oct)2 without any additives. Interestingly, in this work, as shown in Figure , no extra equivalent of base is needed for both Ti and Sn catalyst systems. Both the Ti and Sn showed excellent reactivity in the oxidation of benzoin. After 5 hours, the oxidized product benzil could be obtained in 99.2%, 98.3% yield respectively. The catalyst's loading was also evaluated. The Ti and Sn catalyst loading had a big effect at the beginning of the reaction. Even though, after 5 hours, 2.5% Ti(iv) and 0.5% Tin(ii) can both give the oxidized product with over 90% yield. The substrate scope and mechanism of Ti and Tin catalytic oxidation of alcohols are currently under evaluation. Many groups developed selective oxidation of alcohols using DBU-based catalytic systems, such as NBS/DBU-mediated method , a binary system made up of tris(2methylphenyl)bismuth di-chloride and DBU, DBU-hydrobromide-perbromide DBUH + Br3 - , N-tert-butyl phenylsulfinimidoyl chloride in the presence of DBU.