The Cover Feature shows that today modern chemistry helps to achieve the ancient goal of alchemists: transforming waste and worthless materials into precious products such as organocatalysts. By satisfying the principles of a green and more sustainable chemistry, waste biopolymers, such as chitosan, alginic acid, and cellulose, renewable platform molecules from urban waste and saccharide biomass, such as levoglucosenone, isosorbide, mannose, d‐glucosamine, and lecithin, but also terpenes and rosin together with natural proteins have been transformed into hetero‐ and homogeneous catalysts. These sustainable promoters have proven to be efficient catalysts for several synthetic methodologies. More information can be found in the Minireview by S. Meninno.

中文翻译：

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废物估价：来自可再生资源的可持续有机催化剂

封面功能表明，当今现代化学有助于实现炼金术士的古老目标：将废物和毫无价值的材料转化为珍贵的产品，例如有机催化剂。通过满足绿色和更可持续发展的化学原理，废弃的生物聚合物（例如壳聚糖，藻酸和纤维素），城市废弃物中的可再生平台分子和糖类生物质（例如左葡萄糖苷，异山梨醇，甘露糖，d-葡萄糖胺和卵磷脂），而且萜烯和松香与天然蛋白质也已被转化为异质和均相催化剂。这些可持续的促进剂已被证明是几种合成方法的有效催化剂。可以在S. Meninno的Minireview中找到更多信息。