The front cover picture, provided by Kicheol Kim, illustrates the development of a ruthenium catalytic system for acyl cyanide synthesis via acceptorless dehydrogenation of cyanohydrins. As opposed to the thermodynamically preferred elimination of hydrogen cyanide, the dehydrogenation of cyanohydrins could be kinetically controlled with ruthenium(II) bidentate phosphine complexes. Effects of ligands and counter anions in the ruthenium catalyst were investigated to modulate catalytic activity and selectivity. Details can be found in the communication on pages 3292–3298 (K. Kim, A. M. P. Moeljadi, H. Hirao, S. H. Hong, Adv. Synth. Catal. 2017, 359, 3292–3298; DOI: 10.1002/adsc.201700786).

中文翻译：

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封面图片：氰醇与（η6-芳烃）卤化物（二齿膦）钌（II）配合物的无受体和无碱脱氢（合成合成酶，目录号19/2017）

由Kicheol Kim提供的封面图片说明了通过氰醇无受体脱氢合成钌氰化物的钌催化体系的发展。与热力学上优选的氰化氢消除相反，氰醇的脱氢可以用钌（II）二齿膦膦配合物动力学控制。研究了配体和抗衡阴离子在钌催化剂中的作用，以调节催化活性和选择性。细节可以在上3292-3298页的通信中找到（K.金，A. M. P. Moeljadi，H.平尾，S. H.香，。。进阶Synth的CATAL。2017，359，3292-3298; DOI：10.1002 / adsc.201700786）。