The Front Cover shows a strategy to simultaneously produce two important chemicals, namely, methallyl alcohol and diethyl acetal. They are produced from methacrolein in ethanol solvent at low temperature on Beta zeolites modified by tin (Sn‐β catalysts). The catalyst pre‐calcined in Ar (Sn‐β‐Ar) enables more Sn species to be exchanged into the framework as isolated tetrahedral Sn(IV), thus enhancing the catalytic activity of the Meerwein–Ponndorf–Verley reaction. The findings of Sn‐β fine‐tuned through different treatments are of great significance toward understanding and manipulating the complex reaction between α,β‐unsaturated aldehydes and primary alcohols. More information can be found in the Full Paper by Hu et al. on page 4715 in Issue 23, 2017 (DOI: 10.1002/cssc.201701435).

中文翻译：

---

封面：利用Sn-β同时合成甲代烯丙醇和二乙基缩醛的策略（ChemSusChem 23/2017）

封面显示了同时生产两种重要化学物质，即甲代烯丙醇和二乙基乙缩醛的策略。它们是由甲基丙烯醛在乙醇溶剂中于低温下在锡修饰的β沸石（Sn-β催化剂）上制成的。在Ar中预煅烧的催化剂（Sn-β-Ar）使更多的Sn物种可以作为孤立的四面体Sn（IV）交换到骨架中，从而增强了Meerwein-Ponndorf-Verley反应的催化活性。通过不同处理对Sn-β进行微调的发现对于理解和操纵α，β-不饱和醛与伯醇之间的复杂反应具有重要意义。有关更多信息，请参见Hu等人的论文全文。就在第23期，2017年4715页（：10.1002 / cssc.201701435 DOI）。