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I 008, IndiaWhile the titanium silicalite-1 (TS-lkferf-butyl hydroperoxide (TBHP) combination exhibits remarkable activity and selectivity in the oxidative cleavage of the C-C double bond of silyl enol ethers to produce dicarboxylic acids, the chemoselective oxidation of thioethers to sulfoxides without generation of sulfones is achieved using chromium silicalite-2 (CrS-2)-H202.

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The magnesium salt of (S)-isomer of omeprazole, with a trade name of Nexium, is the first proton-pump inhibitor developed as a single isomer for the treatment of acid-related diseases. A process for the preparation of the optically pure (S)-isomer of omeprazole through transition metal complex is described.

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