Iron Carbonyl Complexation of Dithioesters. Formation of a Chiral Carbon Center σ-Bonded to an Iron Atom
作者:Alain Benoit、Jean-Yves Le Ma Rouille、Christian Mahe、Henri Patin
DOI:10.1016/s0022-328x(00)81020-7
日期:1981.10
with diiron nonacarbonyl to afford binuclear complexes resulting from coordination of the carbon—sulfur double bond to the two iron atoms and donation of two electrons from the S-alkyl group to one iron center. This novel mode of complexation creates a carbon—iron single bond and a chiral center at the carbon atom bonded to the metal, as shown by the spectroscopic studies and by an X-ray structure determination
A simple and rapid access to fluorinated dithioesters was developed by a one-pot sequence corresponding to a Grignard reaction—Mitsunobu type substitution. These activated dithioesters have shown excellent reactivity in an aminolysis reaction from simple or more complex primary amines such as cinchona alkaloids. A stoichiometric amount of amine was sufficient to prepare various thioamides, including
thioamide derivative was synthesized by conventional radical polymerization. The copolymers were tested as homogeneous supported organocatalysts in the enantioselective decarboxylative protonation (EDP) of α-aminomalonate hemiesters giving access to α-amino acids under very mild conditions. These macromolecular catalysts could be prepared on a large scale and outperformed their unsupported analogues providing