New RuCl2(benzimidazole)(arene) complexes have been prepared. Upon reaction with 1,1‐diphenylprop‐2‐ynol they generate catalyst precursors which perform the cycloisomerization of diallyltosylamide into 3‐methyl‐4‐methylene‐N‐tosylpyrrolidine. The presence of N‐(2,4,6‐trimethylbenzyl)benzimidazole as ligand leads to a subsequent isomerization and gives the 3,4‐dimethyl‐N‐tosylpyrroline. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
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Özdemır et al. (2004) studied this question.
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