A general method for the preparation of the MacMillan imidazolidinones is described. Treatment of an alpha-amino amide with a carbonyl compound in refluxing chloroform in the presence of Yb(OTf)(3) (1 mol %) provides convenient access to the corresponding imidazolidinones. (C) 2011 Elsevier Ltd. All rights reserved.
A general method for the preparation of the MacMillan imidazolidinones is described. Treatment of an alpha-amino amide with a carbonyl compound in refluxing chloroform in the presence of Yb(OTf)(3) (1 mol %) provides convenient access to the corresponding imidazolidinones. (C) 2011 Elsevier Ltd. All rights reserved.