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首页> 外文期刊>Catalysis science & technology >Room temperature Z-selective hydrogenation of alkynes by hemilabile and non-innocent (NNN)Co() catalysts
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Room temperature Z-selective hydrogenation of alkynes by hemilabile and non-innocent (NNN)Co() catalysts

机译：室温Z选择性氢化通过Hemilabile和非处以（NNN）CO（）催化剂（）催化剂

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摘要

Hemilabile and phosphine-free quinolinyl-based NNN-type pincer and non-pincer cobalt complexes were developed for the room temperature catalytic transfer semi-hydrogenation of alkynes to Z-alkenes. Treatment of the quinolinyl-amine ligand, [C9H6N(NH)CH2CH2NEt2] (QNNNCH2NEt2)–H with CoX2 afforded the pincer complexes κ3-(QNNNCH2NEt2)CoX2 (X = Cl, Br), whereas, the quinolinyl-amide ligand, [C9H6N(NH)C(O)CH2NEt2] (QNNNC(O)NEt2)–H gave chelate anionic complexes κ2-(QNN)CoX2(NC(O)HNEt2) (X = Cl, Br). The well-defined anionic non-pincer cobalt complexes efficiently catalyzed the semi-hydrogenation of diverse alkynes to deliver highly chemoselective and stereodivergent Z-alkenes at room temperature. This hydrogenation exhibited broad substrate scope with the tolerance of sensitive functional groups, such as –Cl, –Br, –I, –OH, –NH2, –COOMe, and pyridinyl, employing a stable and user-friendly ammonia borane hydrogen source.
机译：开发了半脂和无磷酸喹啉基的NNN型钳子和非尖钴复合物，用于将炔烃向Z-Alkenes的室温催化转移半氢化。 （NH）C（O）CH2NET2]（QNNNC（O）net2）–H给出了螯合物阴离子复合物κ2-（qnn）Cox2（nc（o）hnet2）（x = cl，br）。 定义明确的阴离子非尖钴复合物有效地催化了多种炔烃的半氢化，在室温下提供了高度化学的和立体化的Z-烯烃。 这种氢化表现出广泛的底物范围，具有敏感官能团的耐受性，例如–cl，–br，–i，–oH，–nh2，–nh2，–coome和吡啶基，采用稳定且用户友好的氨基氢氢源。

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