Cyclopropyl Iminium Activation: Reactivity Umpolung in Enantioselective Organocatalytic Reaction Design
作者:Christof Sparr、Ryan Gilmour
DOI:10.1002/anie.201103360
日期:2011.8.29
concept of cyclopropyl iminium activation for the organocatalytic desymmetrization of meso‐cyclopropylcarbaldehydes is presented. A combination of nucleophilic and electrophilic chlorinating reagents leads to a formal addition of Cl2 across one of the cyclopropyl bonds giving access to 1,3‐dichlorides in an enantioselective, catalytic fashion.