So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Silva, Ana Rosa; Carneiro, Liliana; Carvalho, Ana P.; Pires, Joao researched the compound: Bis((S)-4-phenyl-4,5-dihydrooxazol-2-yl)methane( cas:132098-59-0 ).Electric Literature of C19H18N2O2.They published the article 《Asymmetric benzoylation of hydrobenzoin by copper(II) bis(oxazoline) anchored onto ordered mesoporous silicas and their carbon replicas》 about this compound( cas:132098-59-0 ) in Catalysis Science & Technology. Keywords: asym benzoylation hydrobenzoin copper oxazoline complex silica carbon replica. We’ll tell you more about this compound (cas:132098-59-0).
A copper(ii) complex with a com. chiral bis(oxazoline) was anchored onto ordered mesoporous silica materials and their resp. carbon replicas. The amount of transition metal complex loaded onto the mesostructured solids was determined by ICP-AES and the materials were also characterized by elemental anal., FTIR, TG/DSC and isotherms of N2 adsorption at -196 °C. For the first time the asym. benzoylation of a 1,2-diol was performed in the heterogeneous phase by using an anchored com. bis(oxazoline) ligand. The effect of the type of mesoporous material on the catalytic parameters, as well as on the reutilization of catalysts in several catalytic cycles, was checked. All the composites prepared were active, selective and enantioselective in this asym. organic transformation. Using the two ordered mesoporous silicas as supports good selectivities, with comparable yields and TONs to the homogeneous phase reaction, were obtained. Furthermore these two heterogeneous catalysts are more stable upon reuse than the corresponding ordered carbon replica materials. One of the former heterogeneous catalysts, with mesoporous silica as a support, could be further reused for 4 consecutive cycles without significant loss of selectivity, the TON or enantioselectivity.
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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles