Diastereoselective Methyl Orthoformate Alkylations of Chiral<i>N</i>-Acylthiazolidinethiones Catalyzed by Nickel(II) Complexes
作者:Juan Manuel Romo、Erik Gálvez、Ignasi Nubiola、Pedro Romea、Fèlix Urpí、Max Kindred
DOI:10.1002/adsc.201300521
日期:2013.10.11
AbstractThe completely diastereoselective silyl triflate‐mediated methyl orthoformate alkylation of chiral N‐acyl‐4‐isopropyl‐1,3‐thiazolidine‐2‐thiones catalyzed by commercially available nickel(II) complexes is reported. The simple experimental procedure requires 2.5–5 mol% of bis(phosphine)nickel dichloride [(R3P)2NiCl2] complexes, proceeds under very mild conditions, and covers a wide array of acyl groups. Furthermore, it can potentially be expanded to different electrophiles.magnified image