Formal Highly Enantioselective Organocatalytic Addition of Alkyl Anions to α,β-Unsaturated Aldehydes: Application to the Synthesis of Isotope-Enantiomers
Copper?? No!! Organocatalysis: For the first time, organocatalyticaddition of masked alkyl chains to α,β‐unsaturatedaldehydes is reported (see scheme). The addition of bisphenylsulfonylmethane takes place in high yields and with excellent enantioselectivities. Furthermore, this methodology allows the synthesis of isotope‐enantiomers.