Regeneration carbohydrate-based

The activated a-trimethylsilyl group on the pyrimidine moiety reacts with the triflate ion 26 to regenerate the triflate catalyst. Under reversible and thus thermodynamically controlled conditions, the nucleophilic silylated base 23 attacks the carbohydrate cation 25 only from the top (/(-side) to afford exclusively the /(-nucleoside. 

If items made of PHAs are composted, they are completely degraded to water and carbon dioxide as the final products of their oxidative breakdown. Here it has to be emphasized that these final oxidation products are the basic materials for the photosynthetic regeneration of carbohydrates by green plants. This demonstrates that, in contrast to petrol-based plastics, PHAs are embedded into the natural closed cycle of carbon. The range of applications for PHAs is not limited to simple packaging materials, but encompasses commodity items, materials for agro-industrial purposes and pharmaceutical and medical applications. The major advantageous characteristics of PHAs can be summarized as follows ... 

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