Highly Selective Reaction of α-Halo-α,β-unsaturated Esters with Ketones or Aldehydes Promoted by SmI<sub>2</sub>: An Efficient Alternative Access to Baylis−Hillman Adducts
作者:José M. Concellón、Mónica Huerta
DOI:10.1021/jo0504969
日期:2005.6.1
A samarium diiodide promoted addition of aromatic or aliphatic β-substituted-α-halo-α,β-unsaturated esters 1 or 3 to both ketones (in THF) and aldehydes (in acetonitrile) led to (Z)-2-(1-hydroxyalkyl)-2,3-alkenoates 2 and 4 in good yields and very high stereoselectivity. This method constitutes an efficient and valuable alternative to the synthesis of Baylis−Hillman adducts. A mechanism is proposed