简单且高度Z选择性的以为基础的烯酸甲解酶催化剂
Giovanni Occhipinti1, Fredrik R Hansen, Karl W Törnroos
1Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway.
Journal of the American Chemical Society
|February 13, 2013
概括
一种新型的格鲁布斯-霍维达催化剂,具有三甲乙酸联体体,在氨酸转化中显示出高Z选择性. 这种强大的催化剂实现了出色的周转率,并保持了Z选择性,为烯合成提供了一个有前途的工具.
科学领域:
- 有机金属化学 有机金属化学
- 催化剂是一种催化剂.
- 有机合成 有机合成
背景情况:
- 奥莱芬转化是形成C=C键的强大工具.
- 格鲁布斯-霍维达第二代催化剂被广泛使用,但往往缺乏高Z选择性.
- 开发具有改善立体选择性的催化剂对于有针对性的合成至关重要.
研究的目的:
- 合成和描述一个新的格鲁布斯-霍维耶达催化剂变体.
- 评估新型催化剂在烯转化中的催化活性和Z选择性.
- 将新催化剂的性能和特性与其母化合物进行比较.
主要方法:
- 在Grubbs-Hoveyda第二代催化剂中的化物联体的一步替代.
- 合成2,4,6-三乙乙酸联体.
- 奥莱芬转化反应,包括终端奥莱芬的同.
- 对Z选择性和营业额数字的分析.
主要成果:
- 一个新的催化剂通过用2,4,6-triphenylbenzenethiolate连接体取代化离子来成功合成.
- 新的催化剂表现出了显著的Z选择性,在终端olefins的同质合中达到高达96%.
- 观察到高的营业额 (至2000年) 和持续的Z选择性 (>85%).
- 催化剂表现出对氧和水的强度,类似于母催化剂.
结论:
- 这种新型的Grubbs-Hoveyda催化剂与三甲基酸连接体是Z-选择性烯转化代谢的高度有效.
- 这种催化剂为合成高效率和选择性Z-olefins提供了有价值的替代品.
- 它的坚固性和性能特性使其适合各种合成应用.
相关概念视频
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