Asymmetric Titanium-Catalyzed Cyclopropanation of Nitriles with Grignard Reagents

Autor: Julien Caillé, Paul Setzer, Fabien Boeda, Morwenna S. M. Pearson-Long, Philippe Bertus
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: SynOpen, Vol 02, Iss 01, Pp 0041-0049 (2018)
Druh dokumentu: article
ISSN: 2509-9396
DOI: 10.1055/s-0036-1591933
Popis: Abstract The titanium-catalyzed asymmetric cyclopropanation of cyanoesters­ with Grignard reagents was investigated for the first time. Particularly, the study of the efficiency of Taddol-based titanium complexes­ has shown that the prior preparation of Taddol titanium complexes was not required and a large panel of ligands was evaluated by using this approach. The spirocyclopropanelactams were obtained with good diastereoselectivity and with moderate enantioselectivities from the main diastereoisomer (up to 32%).
Databáze: Directory of Open Access Journals