Novel structure-defined chiral bis(oxazolinyl)thiophenes for Ru-catalyzed asymmetric cyclopropanation
摘要:
The novel structures of sulfur-containing chiral bis(oxazoline) compounds which have been synthesized have been determined by X-ray crystal diffraction analyses. A high enantioselectivity (ee >99'%) in the asymmetric cyclopropanation of diphenylethene with diazoester using the bis(oxazoline)-Ru(II) catalyst was obtained. (C) 2004 Elsevier Ltd. All rights reserved.
A facile and efficient synthesis of bis(oxazoline)s
作者:Wei Jie Li、Sheng Xiang Qiu
DOI:10.1002/jhet.477
日期:2010.11
β‐amino alcohols in toluene under reflux within 24 h, to form nine bis(oxazoline)s (1, 1a, 1b, 1c, 1d, 1e, 2, 2a, 2b, 2c, 3) in good yields through water deprivation via a one‐pot reaction. The synthetic method is facile and efficient and deserves great application potentials in the research and development in the area of bis(oxazoline)s. J. Heterocyclic Chem., (2010).